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.