SBS 2003 Event ID 1053 - Symptom - Mobile Phone Users can't sync to Exchange

I got a call this morning that my mobile phone users can't connect to Exchange 2003 on our SBS 2003 server.   I was able to connect via OWA without any noticable issue.   Checking the error logs I'm getting the following message:

Event ID: 1053

Windows cannot determine the user or computer name. (Not enough storage is available to complete this operation. ). Group Policy processing aborted.

I doubt its storage as I have 1.1 GB on the C drive and 17.1 GB on the data drive (where Exchange resides).

Looking for any help possible!
Who is Participating?
Alan HardistyConnect With a Mentor Co-OwnerCommented:
Have you read and followed the advice in the following MS article:

Not sure if the event ID is related to Exchange and Activesync, but time will tell.

Have you also run the Exchange Activesync test (without any Autodiscover) on ?
kdubendorfAuthor Commented:
The problem cleared with a system reboot.
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