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"System message 7503, Incorrect Company ID, User ID, or Password" error when logging into Dynamics SL

Applies to:   Microsoft Dynamics SL 2011 Service Pack 2, Microsoft Dynamics SL 2011, Microsoft Dynamics SL 2011 Service Pack 1
Original KB number:   3005116

Symptoms

You receive System Message 7503.

System Message 7503
Login Error: Incorrect Company ID, User ID, or Password.

Cause

User in Microsoft Dynamics SL had a name change and their windows account was changed in Active Directory.

Resolution

A new account must be created in Dynamics SL, and the original account must be deleted.