RECEIVING Messages From A Windows Service
May 2, 2006
I've done a bit of work with the External Activator but I think it may be a bit overkill for what I need to do (which is RECEIVE messages from a single queue and process them with managed code). I've tried creating a Service Broker Interface service that retrieves messages from this queue, but I notice that if I set the timeout to -1 to watch for messages indefinitely, the Service never completes the OnStart code.
I notice if I change the service's timeout to something greater than 0, the message is retrieved, but this defeats the purpose of using a Windows Service app, which I want to continuously monitor the queue. I noticed the External Activator spawns a thread to start monitoring an EventNotification queue, which I can bypass since I want to monitor the notification's target queue.
Rushi, can you point me in the right direction to create a Windows Service that constantly monitors a queue? Also, I'd like the ability to monitor multiple databases (the queue name would be the same) as well, so if that is not feasible from a Windows Service please let me know.
Also, am I sacrificing scalability by NOT using the External Activator and switching to a Windows Service (I believe the External Activator will spawn multiple instances of the processing executable)?
Thanks,
Chris
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Nov 2, 2006
I have an app receiving messages from SQL Service Broker when data is updated. (Messages are located at http://msdn2.microsoft.com/en-us/library/system.data.sqlclient.sqlnotificationinfo.aspx )
When I run this app against a remote SQL Server, I receive the message "Updated" which I expect.
But when I run the same app against the local machine SQL Server, I receive the message "Options".
Does anyone know if there are SQL Server options that must be set to certain values?
I can't seem to find anything that troubleshoots this message... either from a SQLServer- or a .NET standpoint.
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Jun 23, 2006
I am attempting to write a Windows service that watches a database for uploaded files to import. When a new file is found, the corresponding SSIS package is run from the file system with variables passed through. I started development as a Windows app and copied the functionality to a service.
The app runs fine. The service does not. I get a "Failure" each time a package is executed. Everything is identical behind the scenes with the obvious exceptions that OnStart and OnStop handlers are buttons in the app. I added a script task at the beginning of one of the SSIS packages to notify me that it is even running at all. It doesn't even hit that initial task.
Again, the app will run all packages just fine. The data is imported and the results return as "Success."
The following is the code executing the package. Any help is appreciated. I've been banging my head on this one for a few days now. (Is there a tag to format a code sample?)
Dim pkgLocation As String
Dim pkg As New Package
Dim app As New Application
Dim pkgResults As DTSExecResult
pkgLocation = sPackageFolder & PackageName & ".dtsx"
pkg = app.LoadPackage(pkgLocation, Nothing)
Dim vars As Variables = pkg.Variables
vars("ImportId").Value = ImportId
vars("ProductionServer").Value = ProductionServer
vars("ProductionDatabase").Value = ProductionDatabase
vars("SourceFileName").Value = FileName
vars("SourceFilePath").Value = FilePath
pkgResults = pkg.Execute()
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Oct 3, 2001
Hi all,
I want send messages(e.g. error description,record count...)to NT event viewer,how can I implement with sql?
thanks
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Jul 5, 2007
I was wondering if there are any potential issues/drawbacks of a service sending a message to itself. Basically I have a situation where I only require one queue to hold messages. So say for instance I had a service named S1 associated with a queue named Q1 then I can do this:
Code Snippet
Begin conversation dialog @dialog_handle
from S1
to 'S1'
on contract MyContract
with encryption = off;
Send on conversation @dialog_handle
message type MyMessage
This works as expected. Any thoughts?
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Jan 12, 2006
Hi,
I have written a C# console application that adds a message to a SB queue and a C# stored procedure that reads the message from the queue.
I have had so many problems that I'm beginning to doubt the usefulness of this, but that is probably just my frustration speaking.
I am stuck on putting an XML message into the queue and reading the XML in the stored procedure.
The console app has a simple object called Message. This class has 2 fields, a guid and a string. I serialize the object into XML using XmlSerializer. This results in an XML string that looks like this:
<?xml version="1.0" encoding="utf-16"?>
<Message xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http:/
/www.w3.org/2001/XMLSchema">
<TranId>a5b4a32f-4940-46ea-a928-3aae33a067fe</TranId>
<Text>TEST</Text>
</Message>
I use a SqlCommand to SEND the message to the queue. I use the following code to SEND the message:
// Add dialog handle
SqlParameter paramDialogHandle = new SqlParameter("@dh", SqlDbType.UniqueIdentifier);
paramDialogHandle.Value = this.DialogHandle;
cmd.Parameters.Add(paramDialogHandle);
// Add message
SqlParameter paramMsg = new SqlParameter("@msg", SqlDbType.VarChar,4000);
paramMsg.Value = msg.ToXml();
cmd.Parameters.Add(paramMsg);
// Build the SEND command
cmd.CommandText = "SEND ON CONVERSATION @dh " +
"MESSAGE TYPE [http://www.TestSB.com/msg/HelloWorld] " +
"(@msg)";
cmd.ExecuteNonQuery();
For some reason, this message never gets to the stored procedure that is set up to be activated for this queue. Actually, it never even gets written to the queue.
However, If I change the type of parameter in the SEND above to SqlDbType.Xml, the message is written into the queue, but without the '<?xml version="1.0" encoding="utf-16"?>' beginning it, so when my stored procedure tries to deserialize the xml, using XmlSerializer, it fails.
Obviously, I have overcome the backflips needed to do XmlSerialization within the SQLCLR, and I am getting the stored procedure activated, because I do get a message logged showing the XML that is received.
Since I have the queue set up to only allow valid XML messages, I'm assuming that inclusion of the <? xml version..../> line prevents the message from passing Service Broker's XML validation. (And by the way, I have never seen an error message placed into the queue, the event log, or thrown when non-xml is passed to a queue that has XML validation turned on. The message just does not show up in the queue. Is this a bug?) But the lack of the line prevents XmlSerializer from working.
How the heck do you serialize an object into XML using XmlSerializer, so that it can be deserialized with XmlSerializer?
Thanks
]Monty[
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Sep 27, 2007
All,
I am looking at implementing some sort of throttling whereby "expensive" reports are setup as Subscriptions (and hence are run by the Windows Service), while all other requests go the Web Service.
My question is:
Do the two systems share any underlying systems? I understand (of course) that they use the same DB, etc. etc. However, I can't quite tell whether there is an underlying engine that is a common base or if they really just spin up different instances of the same objects and essentially each host the application separately?
Any help is greatly appreciated!
Mark
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Oct 27, 2006
Could anybody suggest to me - is it possible replicate Service Broker Object and messages (in the queue) with usual Replication Process?
Thanks to all very much,
Sveta.
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May 25, 2006
I have an (as yet hypothetical) order entry system. Order data is entered into DB1 and processed in DB2. SSB is used to send the order (order header and detail) via a conversation group. DB1 goes down due to a HDD failure, and is restored from backup. What options do I have for re-processing order dialogs/conversations that were ended just before DB1 went down but do not exist in the restored version of the DB? Or lets say DB2 went down and was restored instead. Order dialogs that are not yet ended in DB2 may have already been ended before it went down, but now do not exist in DB2 after the restore.
Is there a way to restart the conversation from a certain point in time to recover order data that is out of sync due to the failure/restore? A similar scenario might be when restoring production dumps into a test environment; if the dumps are slightly out of sync I'd need to reprocess any messages that were not in sync then the dumps were created.
Thanks!
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May 2, 2006
I am writting a huge Service Broker Application. I notice that each message that is processed appears in the SQL Server Logs. Currently I am just testing with a single queue and tons of messages are showing up in the log. Is there a way that I can turn these informational messages off? I think in the end I may have something like 15 or 20 queues. These messages are very useful for debugging but I may not desire this extensive logging to be running all the time on all of my queues.
Gary
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Nov 26, 2007
I have a question about SQL Service Broker.
Here are the steps I use to produce the issue.
1) I drop the Service Broker on the Receiver by running the following sql script:
if exists (select * from sys.services where name = N'//TyMetrix360Audit/DataWriter') drop service [//TyMetrix360Audit/DataWriter]
2) I send some messages using the SQL Service broker on the sender side
3) The messages I send stay in sender transmission queue. Here is an example of what my transmission queue looks like after running select * from sys.transmission_queue on the sender.
02C54400-309C-DC11-8EED-0002B3D9F7B5 //TyMetrix360Audit/DataWriter 386DDD04-7E55-466A-BE83-37EFC20910B9 tcp://SFT3DEVSQL01:4022/TyMetrix360Audit/DataSender //TyMetrix360Audit/Contract 2007-11-26 14:58:10.207 0 //TyMetrix360Audit/Message 0 0 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 Service Broker received an error message on this conversation. Service Broker will not transmit the message; it will be held until the application ends the conversation.
F620FA2D-309C-DC11-8EED-0002B3D9F7B5 //TyMetrix360Audit/DataWriter 386DDD04-7E55-466A-BE83-37EFC20910B9 tcp://SFT3DEVSQL01:4022/TyMetrix360Audit/DataSender //TyMetrix360Audit/Contract 2007-11-26 14:59:26.813 0 //TyMetrix360Audit/Message 0 0 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 Service Broker received an error message on this conversation. Service Broker will not transmit the message; it will be held until the application ends the conversation.
The main point is that the sys.transmission queue retains the messages with the error 'Service Broker will not transmit the message; it will be held until the application ends the conversation.'
4. I execute the following sql statment on the sender:
select * from sys.conversation_endpoints
and see that the conversation that sent the messages are in state 'ER'
5. I then recreate the receiver with the following script:
create service [//TyMetrix360Audit/DataWriter] authorization dbo on queue dbo.TyMetrix360AuditQueue([//TyMetrix360Audit/Contract])
6. I send some more messages and see that the new messages are being received and processed correctly.
7. But what of the messages stuck in the sender transmission queue. How are these messages to be resent? Since the conversations are in state 'ER' it seems they are not being resent. Do I need to write a custom SQL script to resend them? I do not want to end the conversation because the message will be lost and not resent.
So, in conclusion, the main question is:
When the receiver goes down, or the receiver service broker simply does not exist and messages pile up the sender transmission queue like in my example how do these messages get resent when the receiver is restored?
By the way when I run
select service_broker_guid from sys.databases where database_id = db_id()
I get the same GUID after the server is restored.
Thanks
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Nov 26, 2007
Here is a description:
1. drop receiver side service broker with sql command : drop service [//TyMetrix360Audit/DataWriter]
2. send a message from the sender.
3. now the sys.transmission_queue on the sender keeps the message.
The relevant tables on the sender and receiver no look like this:
the following summarizes the transmission queue on the SENDER:
conversation handle message_body transmission status
5A0F1D1F-449C-DC11-8EED-0002B3D9F7B5 my message in binary, ie 0x.F4E1.... <blank>
the following summarizes the sys.conversation_endpoints on the SENDER:
conversation handle conversation_id state
5A0F1D1F-449C-DC11-8EED-0002B3D9F7B5 461891C8-5D53-4D89-A7C6-097FE2EDB22A CO
the following summarizes the transmission queue on the RECEIVER:
conversation handle message_body transmission status
5A0F1D1F-449C-DC11-8EED-0002B3D9F7B5 message body of error message...... One or more messages could not be delivered to the local service targeted by this dialog.
the following summarizes the sys.conversation_endpoints on the RECEIVER:
conversation handle conversation_id state
5A0F1D1F-449C-DC11-8EED-0002B3D9F7B5 461891C8-5D53-4D89-A7C6-097FE2EDB22A DO
What do I do now?
There is a message stuck in the sender transmission queue. You responded in my last post that I need to do a RECIEVE on the sender and end the conversation myself? This is not helping me. I am still confused about the answer to this. Can you provide some sort of code outline or steps to resolve this issue. As of now I do not know how to resend my messages stuck in the sender transmission queue and they can not be lost when the conversation is ended.
Also, I thought SQL Service broker was supposed to hadle things like this. It is common for the receiver to not be there. In this case the messages should resend automatically once the receiver is back up. Please help as there is no documentation online about how to resolve this issue and your last response was not adequate.
Thanks
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Sep 26, 2007
I am doing some research to see if the Service Broker technology would help my company with our Enterprise application. Here is our scenario: We have a 3 tier system. The first tier needs to contact the second tier asynchronously. Hence, using queues is a good option. However, the process that needs to happen on the second tier is mostly process intensive with little database updates. Is it still worth our time to use Service Broker?
I like the concept of Activation that Service Broker provides. But, from what I am reading most of the documentation describes activation as a way to call another stored proc. I definitely dont' want to do any process intensive work on the SQL server. So here comes my question...
How would I use a windows service to listen to the activation event from the Service Broker. I could have multiple windows services watching the same queue (scalable). Would I have to handle collisions myself? If so, I think I would rather keep it simple, and just use a simple table as my queue.
Thanks for your comments in advance...
Vijay.
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Feb 13, 2006
Hello All,
After hitting limitations in the SQL CLR world that bar us from invoking COM objects we are forced to use windows services to read the messages off the Service Broker Queues.
Unfortunately we loose the auto activation feature in the Queues, but we can still read messages and perform the SQL work under one transaction.
We are going to attempt to take N messages simultaneously from the Queue, though N instances of a windows service. If the messages send to the queue are one message per conversation, will we be able to achieve having N readers take messages off simultaneounsly?
Thank you very much,
Lubomir
P.S. if anyone has a better approach to obtaining the message in "out of sql code" or invoking external (not assemblies stores in SQL server) code libraries, that would be etremely nice to hear. I have thought about invoking a web service through CLR, but that is probably too much overhead - MSMQ seems much more appealing than a web service;
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Mar 2, 2004
I want to monitor the transaction log files for growth to limits and be able to automatically shrink the log... I had to do it manually the last time I had to do it with my current setup.. Is there away without having to run a windows service for monitoring the file size or drive space left?
Example; current transaction log is ~8gigs at full limit... reduced was ~5gigs, this is just 1 transaction log for 1 database on server.
Morgan
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Jul 24, 2007
Greetings. I'm wondering if y'all typically turn off filesystem indexing (IE: uncheck "Allow indexing service to index this disk for fast file searching") on the drives that hold your ldf and mdf files? Do any mssql services depend on this functionality?
Thanks,
Amy
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Mar 26, 2008
HI,
Recently i had to maintain few SSIS packages. One of the packages keeps running indefinitely to monitor a folder for new files using FileSystemWatcher. Once new file is arrived, it simply renames file and calls another package for further processing. My first impression was that windows service might be a better choice for such functionality.
Any idea about these two approaches to implement this functionality i.e Continuously running a package using indefinite loop as compared to a windows service.
Thanks
Saeed
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Jan 11, 2007
The problem is integrating an ADO connection into a Service in C#. The peculiar thing is that the same thing works well in an application but throws a problem in the Service i.e. the Service doesnt want to start...
The problem is at establishing the connection - but the same thing works just fine in an Windows application.
string MySqlConnString = "SERVER=N16\SQLEXPRESS; TRusted_connection=yes; database = EventTrack2007";
MySqlConnection = new SqlConnection();
MySqlConnection.ConnectionString = MySqlConnString;
MySqlConnection.Open();
Thank you!
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Jul 13, 2006
The Sql Mobile site on MSDN recommends that you do not host SQL Everywhere when running as a service. Is this a recommendation, if so why, or is it simply not possible. My understanding is that when hosteed in a IIS hosted application a not supported exception is throw.
If anyone has any ideas on this or pointers to some resources i would appreciate them.
Thank You
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Dec 1, 2006
I'm building a Windows Service which keeps getting denied access to SQL Server 2k. The Service operates as a System User rather than an individual user profile.
I've tried Trusted_Connection=yes and Integrated Security=SSPI but these are both denied.
Any ideas what the connection string to connect to SQL Server 2k from a Wndows Service is?
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Jul 9, 2007
hi all.
please help with my dilemma.
this is my task:
i should write a service that will run every 1 hour.
this service should check a folder.
inside this folder there are some xml files, all of them in the same format exactly.
when the service encounters with this xml file, it should open it,pull some data out of it, and update a table in the db.
NOW - I HAVE 2 OPTIONS, AND THIS IS THE DILEMMA:
should i write a clr function to do this task, or should i just write a standard c# windows service, that will open a connection to the db when it should perform update?
what are the advatages?
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Feb 11, 2008
I've got a report that shows the current status of sql activity on my servers for our ERP application. The one thing I've been wanting to do is to add the ability to check if a certain windows service on another server is running. Is this possible in Reporting Services 2005?
Thanks,
Ian
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Nov 24, 2006
Hi,
I'm currently writing a windows service which will generate XML documents for FTP upload. When running the service the goal is to get records from a stored procedure, then generate the XML documents.
When running the service (lokal service account) the connection fails; instead of using the supplied connection string, it defaults to the LocalService account. How can this be solved?
Thanks in advance
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May 20, 2006
I'm developing a Windows Service to watch for an e-mail and then launch a package. It extracts some parameters from the e-mail that I then need to pass to the package. What is the best way to launch the package from the service? Should I run it in a new thread? I don't want the service to have to wait for the package to complete. How would I pass the parameters? Should I use dtexec? If the service fails or is stopped and the package is still running, it would terminate the package also, correct? Any way to avoid that? Thanks.
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Oct 12, 2006
How to find out the SP available for sql server 2000 with win xp
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May 24, 2006
Hi
I would like to use SSIS Script for Monitoring Windows Service...
If Windows Service Up / Down. I should be able to Notified by
Using SSIS Script(SQL SERVER 2005).
Please Help me
Thanks & Regards
Deepu M.I
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Oct 26, 2007
Hi
I am in weired move kindly help me out..I created report using sql server 2005 Reporting services..At one stage it is working fine with proper parameter but due to bad input parameter my report goes in hang mode..so i went to my DB server and restart my reporting service and then MSSQLSERVER I dont remember sequence (may be vice versa) now I am not able to get report when i am passing right parameter..I went to google and only I came to know that due to sequence of restart of services will cause this error..
error like..Application error:
Report Server Windows Service (MSSQLSERVER) cannot connect to the report server database.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Syste error:
The SQL Server Integration Services service failed to start due to the following error:
The service did not respond to the start or control request in a timely fashion.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Kindly help me out.
T.I.A
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Jul 23, 2005
I'm getting Not associated with a trusted SQL Server connectionerrors on a .Net windows service I wrote, when it's running on myapplication server.It's not a problem with mixed mode security. I'm set for mixed mode andI've been running the service on the app server for over a month withno problem. My database is running on a second server and both areunder the same domain.The problem has occurred twice over the last two months.The windows service queries a table every 30 seconds, looking forrecords to process. It's using a connection string and the user id issetup and working in SQL. That when it's generating the error.I've changed the connection string user id to sa and I still get theproblem. (server=xxx;database=yyy;user=sa;pwd=xyz)The windows service is running under the domain/Administrator account.I can run the windows service from a workstation with no problem. Butwhen I start it up on the application server, I get the 'notassociated' error back from Sql Server.I'm trying to figure out where the problem is, and why it'sintermittent. Is it rights, policy, security? Why does it work for awhile then then error out?Any suggestions or help is appreciated.Thanks,Eric
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Jul 27, 2005
Hi,I tried to Develop one Report in SQL Reporting Service. I haveinstalled SQL Reporting Serivice in Windows 2003 machine. SQL ServerDatabase is in another machine, running on Windows 2000. I developedand deployed the report and all went fine.When I tried to see the report through the Report Service Manager WebPage it is comming properly. But When I tried to See the report inanother web page, I'm not able to see the images. But the Data isgetting Displayed and only Image is not comming. When I exported thereport to Excel, the Image is comming over there.I am using Report Viewer control (Which came as Sample Program) inthe ASPX Page to render the report. I'm using SQL Server 2000 with SP3aand SQL Server 2000 reporting Service with SP1.I tried setting the Mime Time for the GIF image and even "*.*" inthe Mime Type settings of IIS 6.0. Even then its not displaying theimage.Can any one help me out in solving the problem?Thanks in Advance.With RegdsKrish
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Jul 20, 2005
Hello,I hope you guys can help me with a problem that I am facing...I have started the MSSqlServer service and SQLServerAgent serviceswith a domain username and password.There are periodic password resets to this user. Security policieswithin the company dictate that the password for this domain accountcannot be permenant.Would there be any way to automatically reset the pwd in theseservices instead of manually changing them each time?Thanks
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Nov 17, 2006
Hi,
On the page http://www.microsoft.com/sql/editions/compact/default.mspx it is recomended that you dont use SQL Server Compact Edition if "you want to run as a service" - is this refering to the host application or to the fact the SQL Server Compact Edition is an embedded database rather than the more traditional SQL Server client/server architecture?
If its the former is this likely to change at any point in the future? Also what sort of problems are likely to occur if we did run it from within a windows service?
Many thanks,
- James
*EDIT [Changed capitalization]
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Jan 10, 2008
I am using windows authentication to send messages from one server to another.
The user is a domain user that is sysadmin on both servers and db owner of each database.
The errors I see in porfiler are as follows
At target,
An error occurred while receiving data: '10054(error not found)'.
and the following at the initiator:
Connection handshake failed. An OS call failed: (8009030c) 0x8009030c(The logon attempt failed). State 67.
For what its worth, the script for my target endpoint is below, and access has been granted to public:
CREATE ENDPOINT [BROKER]
AUTHORIZATION [MYDOMAINmssqlssb]
STATE=STARTED
AS TCP (LISTENER_PORT = 4022, LISTENER_IP = ALL)
FOR SERVICE_BROKER (MESSAGE_FORWARDING = DISABLED
, MESSAGE_FORWARD_SIZE = 10
, AUTHENTICATION = WINDOWS NEGOTIATE
, ENCRYPTION = REQUIRED ALGORITHM RC4)
I've actually used these users/objects successfully dozens of times on a seperate server with many clients...I am just re-scripting the objects here on this new server. The new remote machine is an image of one of the original machines that was working fine (with new broker GUIDs).
Thanks for any insight.
John
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