How to correctly remove MS Exchange 2016 from a domain?

Question

System administration

The situation is this. The MS Exchange 2016 server was added and configured to the domain in order to "try it like it is". As a result, it was decided to use the mailer from Office 365. Mail was not transferred to this server, only a few test mailboxes were created, which it is not a pity to delete. Question: how to properly remove Exchange from the domain so that there are no "tails" left?

UPD. Based on the results of reading the documentation, I found out that I needed to cut out all the boxes from the base, as well as the connectors.
Deleted all boxes except

[PS] C:\Windows\system32>Get-Mailbox -Database "Mailbox Database 1972629297" -AuditLog

Name                      Alias                ServerName       ProhibitSendQuota
----                      -----                ----------       -----------------
SystemMailbox{8cc370d3... SystemMailbox{8cc... exchange         50 GB (53,687,091,200 bytes)

How to get rid of it? Off dock says only about moving to another server, but I have nowhere to move.

Answer 1

Run setup and select the uninstall option.
If something is wrong, Exchange will write to you.