Assume that you have a Microsoft SQL Server Integration Services (SSIS) package that has multiple parallel tasks internally, and each of these tasks shares a same connection manager. When an expression is used for both connection string and password of the connection manager, you notice that intermittent connection error that resembles the following may occur:
DateTime Logon Login failed for user 'XXXX'. Reason: Password did not match that for the login provided. [CLIENT: <local machine>]
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: