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Activesync only downloads all emails if already downloaded to Outlook Client, otherwise intermittent emails received

Last Modified: 2013-12-05
Server Spec - SBS 2003 SP2, Exchange 2003 SP2
I have a few PDAs (mostly O2s XDA and UBIQUIO) with either 2003, Mobile 5, Mobile 6.   These have all been working fine sending/receiving emails via GPRS until a few weeks ago.  
The following are all working OK with Self Signed Digital Certificate
Internal Outlook clients
The only change I can think of is I moved the Information Store to another disk, due to out of disk space.
Now when a PDA tries to sync emails, it downloads some emails, not all, but on the odd occasion it will download all.   Have tried plain text, rich text, HTML.  Have tried soft-reset and the same applies.
If Outlook client is open, and emails have been retrieved.  The PDA syncs perfectly everytime.
I have trolled the web looking for a solution, with no luck.
The only thing I have tried is http://support.microsoft.com/kb/298415 - added the registry setting and rebooted server. with no luck.
Any help would be great.
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Have solved it after calling Microsoft....not cheap one off call.

The problem was with ScanMail for Microsoft Exchange Master Service  once I stopped the service, the PDAs Activesync started working normally.

I had to stop and start any third party software services on the server and troubleshoot receiving email.  Thirdparty software I had was Trend and Scriptlogic products.   He mentioned he had seen something similar with the "ScriptLogic File System Auditor Service".

Hope this helps other people
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Thanks.  Was dreading the hour plus phone call to Trend.
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