We did find this to be an issue on the way the Project Accounting menu's are loading. I'm guessing the customer is not on the latest code install where this is fixed?
Options are to update to where this is fixed.
Remove Project accounting from the set file, but if the customer uses it, not an option.
Last would be to temporarily set the SYUSERDFSTR = 0, so you can login, but if you do this, workflow will not work.
Does the customer use workflow?
UPDATE DYNAMICS..SY01402
SET SYUSERDFSTR = 0
WHERE USERID = 'GLOBALUSER'
AND syDefaultType = 98
Usually, the SYUSRDEFSTR value returned should be either 1 (Windows Account) or 2 (Organizational Account), we are temporarily setting it to zero to allow you to log in.
Thanks
Terry Heley
Microsoft