We have Exchange 2010 SP2. We encountered several errors in application event log with event ID 1243:
Error encountered attempting to update a categorized view to reflect an operation on a message.
Database: DB1
Folder: ???
MsgHeader ID: *****
Folder ID: *****
Categorization ID: *****
Document ID: *****
Message Operation: 0
Function: EcCategorizeMessage
Error Code: 0x48a
I used exfolder and I found name of affected mailbox and name of folder, which reports error (according FolderID).
Have you ever met with this event ID 1243? Do you know what is MS-OLK-BGPooledSearchFolder or how to continue in investigation?