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Event ID: 5783 Source: OfficeSharePointserver

Synchronization for Shared Services Provider 'SSP' has failed. The operation will be retried.

Reason: Collection was modified; enumeration operation may not execute.

Technical Support Details:
System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
   at System.Collections.Hashtable.HashtableEnumerator.MoveNext()
   at Microsoft.Office.Server.Administration.SharedResourceProvider.SynchronizeConfigurationDatabaseAccess(SharedComponentSecurity security)
   at Microsoft.Office.Server.Administration.SharedResourceProvider.SynchronizeAccessControl(SharedComponentSecurity sharedApplicationSecurity)
   at Microsoft.Office.Server.Administration.SharedResourceProvider.Microsoft.Office.Server.Administration.ISharedComponent.Synchronize()
   at Microsoft.Office.Server.Administration.SharedResourceProviderJob.Execute(Guid targetInstanceId)
From a Microsoft support forum:
Try the following:

stsadm -o sync -listolddatabases 1

This gives us a list of databases that has not been syncronized for 1 day. You can change the values if you want to check further back in time.

stsadm -o sync -deleteolddatabases 1

This sounds scary right but it actually just deletes the record to the databases.

Restart the Windows SharePoint Timer Service

stsadm -o execadmsvcjobs

Some users confirmed that this worked in certain circumstances, but not all the time.

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