I'm running GMS 2.0.4 on a Windows 2003 server. I was sync'ing fine until
one weekend, the sync'ing just stopped. When I check on my phone, it said
that a password was not supplied.

What causes this to happen? I have a user that complains constantly about
his phone forgetting the password and he's always having to re-enter the
password for it to sync.

What can I do to help prevent this?

Thanks in advance.