Event Type: Warning
Event Source: MSExchangeIS
Event Category: Virus Scanning
Event ID: 9874
Date:
Time:
User: N/A
Computer:
Description: Unexpected error 0x80040109 occurred in "EcProcessVirusScanQueueItem" during virus scanning. Mailbox Database: /o=
/ou=
/cn=Configuration/cn=Servers/cn=
/cn=Microsoft Private MDB
Folder ID: 4b-1FF132F
Message ID: 4b-22192E7

User's solution

This works!

Microsoft KB article
Event IDs 9567 and 9874 are logged after you install Exchange Server 2007 Service Pack 1:
http://support.microsoft....spid=10926

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