Based on the article: https://docs.microsoft.com/en-us/Exchange/manage-hybrid-exchange-recipients-with-management-tools#will-this-work-for-me I am trying to install 1x Exchange Server 2019 2019 VM on Windows Server 2019, and then shut it down to minimize the attack vector.
This is my existing setup throughout my single forest AD Domain:
All of the above servers just running as mailbox servers and all of the mailboxes have been migrated to Exchange Online (Hybrid Exchange & Azure AD).
What's the procedure to uninstall or decommission the above existing Exchange Servers?
Can I install 1x Exchange 2019 on Windows Server 2019 VM in Azure and then shut it down?
Any help and suggestion would be greatly appreciated.
Thanks in advance.