Outlook inbox is not updating 0x00040820
Also, while using old versions of Outlook like 2000 / 2002 (in which OST file size was limited to 2GB), this error message used to pop up when user attempts to synchronize Exchange mailbox with file that has crossed 1.82 GB file size (oversized).
Possible solutions to fix errors in background synchronization: At times, moving OST file data in to PST file cannot be easily carried out.
This Exchange Server error 0x00040820 is seen in all Outlook versions using Exchange 2003, when synchronization between Exchange mailbox and file on desktop fails.Obviously, it's much better to remove unnecessary references.That covers the only two "workarounds"-any Reference MUST be present. If this is a Front-End mde database (program without data), then it should be easy enough to just distribute a new file to overwrite the old Front-End, without having to go to any major installation procedure?So, let us see what are the main causes for this synchronization error in Outlook OST?Exchange errors in background synchronization: While trying to sync Exchange Server 2003 mailbox with the OST file on Windows system, user may encounter the error message, “Task ‘Microsoft Exchange Server’ reported error (0x00040820): Errors in background synchronization.