HowTo: Migration from Exchange 2013 to Exchange 2019 (Part 3)

Frank Zöchling

2 years ago

In the last part of the Exchange 2013 to Exchange 2019 migration, the environment is cleaned up and Exchange 2013 is uninstalled. The first two articles can be found here

The mailboxes and public folders have already been moved to part 2. Only a few simple steps are required to uninstall Exchange 2013 and complete the migration:

Customize send connector

The Exchange 2013 server must be removed from the send connector as the source server so that the uninstallation can be carried out:

If not already done, all devices that may have used Exchange 2013 as an SMTP server (printers or similar) should now also be switched to the Exchange 2019 server. Firewalls or routers that route SMTP port 25 to Exchange 2013 must also be converted if not already done.

Remove Exchange 2013 database

Before the Exchange 2013 database can be removed, it must be ensured that no more mailboxes are stored in the database. The following commands can be used to check whether there are still mailboxes in the old database. The following commands must no longer provide any output:

get-mailbox -Database EX2013
get-mailbox -Database EX2013 -Archive
get-mailbox -Database EX2013 -Arbitration
get-mailbox -Database EX2013 -PublicFolder

If mailboxes are still displayed, the corresponding mailboxes must first be moved to the Exchange 2019 database (see part 2), otherwise the Exchange 2013 database cannot be removed cleanly.

If there are no more mailboxes in the database, the Exchange 2013 database can be deleted: