The Search catalog for the database '{0}' is being seeded, but it is not making progress. It is stuck at {1} percent. The ...

The Search catalog for the database '{0}' is being seeded, but it is not making progress. It is stuck at {1} percent. The ContentIndexSeedingSource is '{2}'. A restart of the Host Controller Service was attempted, but might get throttled. Please monitor the ContentIndexSeedingPercent from Get-MailboxDatabaseCopyStatus and manually restart the service if needed.