I have one upstream server and 17 downstream (configured as replicas). I'm getting this error in one of them and I'm stuck: "An error occurred with the server's data store". Details: SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. at Microsoft.UpdateServices.DatabaseAccess.DBConnection.DrainObsoleteConnections(SqlException e) at Microsoft.UpdateServices.DatabaseAccess.DBConnection.ExecuteReader() at Microsoft.UpdateServices.Internal.DataAccess.HideUpdatesForReplicaSync(String xmlUpdateIds) at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.ProcessHiddenUpdates(Guid[] hiddenUpdates) at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.ReplicaSync() at Microsoft.UpdateServices.ServerSync.CatalogSyncAgentCore.ExecuteSyncProtocol(Boolean allowRedirect) I already tried using the cleanup wizard to no avail.