If you are trying to update the Catalog on one of the Mailbox DatabaseCopy you may see the following error

[PS] C:Windowssystem32>Update-MailboxDatabaseCopy “db01mbx1-10” -catalogonly

A source-side operation failed. Error Content indexing operation failed with the following message: The seeding operati on encountered an error while trying to contact the search service. Error: Microsoft Exchange Search Service may not be  running on server MBX1-10. Specific RPC error message: Error 0x6d9 (There are no more endpoints available from the end point mapper) from cli_Dismount. [Database: DB01, Server: MBX1-10.TRADERS.COM]     + CategoryInfo          : InvalidOperation: (:) [Update-MailboxDatabaseCopy], CiSeederRpcOperationFailedException     + FullyQualifiedErrorId : EEBEE7FA,Microsoft.Exchange.Management.SystemConfigurationTasks.UpdateDatabaseCopy





You may have to start Microsoft Exchange Serach Indexer service but it may not solve the issue so make sure it is running Microsoft Exchange RPC Client Access server

Once these services are started you will notice the same action after running the above cmdlet again





Cheers 🙂