During an Exchange 2010 to Exchange 2010 migration MSA tries to sync the Recoverable Items folder and fails.
5/4/2011 5:41:28 PM CFolder::TryToLock Error 5504 Resource is already locked.( Folder: '', SourceKey: '4CB3DFBAB2A17F44B092C73235C6930D0000005B557C') (Folder: '', SourceKey: '4CB3DFBAB2A17F44B092C73235C6930D0000005B557C')
Afterwards, the MSA reports the following error for each mailbox that it tried to sync.
The Recoverable Items folder and the affected mailbox never syncs again. Restarting all agents does not resolve the issue.
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