We currently have several POs with users that are using GMS with no issues,
however we today tried to add a user who happens to have a duplicate user
name in another PO. The account is created successfully and the user can
log into the GMS web page, but the GMS account is never populated with
e-mail, calendar ....

I'm fairly certain this issue is related to the duplicate user names, but
changing either user name is not really an option. Does anyone know of any
other options.