Lookup From One Table To Other Master Table

I imported an Excel file in the form of a table(11,000 rows) in SQL Server 2012 database called Sanbox, I am trying to link this table to MS-CRM leads table so that I can link all the street addresses from table in Sandbox DB to the respective tables in MS-CRM leads table (200,000 rows), my end goal is to link the owner names from MS-CRM table to Sandbox DB's table with the matching criteria of 'street address'

My simple query looks like this, but it returns 200,000 rows, but I only want 11,000 rows -

SELECT *
FROM Sandbox.dbo.Sheet1$ A
LEFT JOIN [IPlus_MSCRM].[dbo].[FilteredLead] B
ON A.[Street 1] = B.address1_line1