Exchange 2013 Update-MailboxDatabaseCopy with parameter -CatalogOnly fails

You want to only seed the content index catalog for a database copy. Steps according to Update-MailboxDatabaseCopy:

1.    Suspend-MailboxDatabaseCopy database\server

2.    Update-MailboxDatabaseCopy database\server –CatalogOnly

Error after executing Update-MailboxDatabaseCopy database\server –CatalogOnly:

WARNING: Seeding of content index catalog for database 'DB001' failed. Please verify that the Microsoft Search (Exchange) and the Host Controller service for Exchange services are running and try the operation again. Error: There was no endpoint listening at net.tcp://localhost:3863/Management/SeedingAgent-F5A3EDE0-93F6-4126-927B-5026D8E6661D12/Single that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details..

Solution: do not suspend the database when only seeding the content index catalog

Suspend-MailboxDatabaseCopy database\server is only required when seeding a database copy.