"0X86000108" : Windows Mobile Device is not synchronizing OR syncs occasionally

Few users complained that their Windows Mobile Device stopped synchronizing. They get this error number 0X86000108  in ActiveSync program on their Windows Mobile device. I informed them to get me the ActiveSync log with "verbose" information to see what's actually going on.

To get the detailed ActiveSync log from the device, follow the link here: Exchange ActiveSync Log

Well I couldn't find anything interesting in the ActiveSync logs. But, I found many Microsoft Support Knowledge base Articles as below.

Date	MSKB
October 25 2007	MSKB 926144: Error message when you use a Windows Mobile 5.0 device to synchronize tasks or messages with a mailbox on Exchange Server 2003 Service Pack 2: "0x86000108"
October 25 2007	MSKB 932054: Error message when you use a Windows Mobile 5.0-based device to synchronize messages with a mailbox on an Exchange 2003 server: "0x86000108"
October 25 2007	MSKB 937788: Error message when you synchronize a Windows Mobile 5.0-based device with Exchange 2003: "Active Sync encountered a problem on the server. Support code: 0x86000108"
April 7 2008	MSKB 950796: The Exchange ActiveSync process is unsuccessful, and an error code is returned to the mobile device in Exchange Server 2003
April 7 2008	MSKB 948744: ActiveSync cannot synchronize a mailbox if the Exchange Server 2003 store contains a corrupted e-mail item

After reading and some consideration, I dismissed KB926144 (Office2007/WM5 incompatibility), KB932054 (hot fix) and KB937788 (hot fix), because my users are using Windows Mobile 6 or 6.1. I couldn't find any error number description at Exchange ActiveSync Error codes and what they mean.

As KB950796 explained, I enable "write" permission to all "authenticated" users to the TEMP directory. No notable results. Users were still suffering the outages. BlackBerry looked like heaven for them. (Well, RIM has their own issues..but what do users know about them? check http://www.blackberryforums.com)

Finally KB948744 suggests about a Exchange 2003 hot fix (SP2 have to be installed). I downloaded (what a relief? Thanks Microsoft..I don't have to call for hot fixes anymore) and installed on the affected back-end Mailbox server. I think, it resolved our issue. But still one user is still suffering.

As a NUMBER-1 IT RULE suggests, if ONLY one user has the issue and all others are working fine, it must be the user device. So I informed the user to try to sync his email to a different Windows Mobile Device and see what happens. Well, I haven't heard back from him yet, but I am sure it's the device.  For your information his device is Samsung Blackjack ver 2.

Let me know if anyone else has same issue and how did you resolve it.