Event ID 9646 recipient exceeded max objects -but not sending odd mail

[dotobi]

Hi

The following error message is being logged regularly in our server's event log:

Event Type: Error
Event Source: MSExchangeIS
Event ID: 9646
User: N/A
Description:
Mapi session "/o=First Organization/ou=first administrative group/cn=Recipients/cn=recipient" exceeded the maximum of 250 objects of type "objtMessage".


I've checked the user's PC and they haven’t been sending large amounts of mail or mails with many attachments.

Also, I've scanned the PC for Viruses (with latest Trend Micro SMB) & for ad/spyware with SpybotS&D. No threats were found.

Our server is Windows Small Business Server 2003 SP1 (inc. SBS' Exchange 2003) and the PC is XP Pro SP2 with Outlook 2003 SP2.

Any ideas what could be causing this?

Thanks

 

[dotobi]

sorry.. the error description is actually:
Mapi session "/o=First Organization/ou=first administrative group/cn=Recipients/cn=FirstnameLastname" exceeded the maximum of 250 objects of type "objtMessage".

 

[xmsre]

http://support.microsoft.com/kb/830836/en-us