This is a reposting of an article I originally wrote on my Developing for Dynamics GP blog.
Why doesn’t the password I use for Microsoft Dynamics GP work for me to access the data in SQL from <insert application name here>?
Why does my password sometimes fail to work from one workstation when it works from another?
Why does the password policy feature only allow one failed attempt before locking me out?
Why is the User ID case sensitive on Microsoft Dynamics GP v10.00?
What is the Password field in the SY_Users_MSTR (SY01400) table used for?
Can I use my Windows or Active Directory Login to access Microsoft Dynamics GP?
I hope to answer all these questions and more by explaining the password encryption that is used by Microsoft Dynamics GP for all users except ‘sa’.