Hi,
We have an Exchange Hybrid setup with Exchange 2013 Cumulative update Version 5.
We have 3 CAS and 3 Mailbox server in HQ site and 2 CAS and 1 Mailbox Server in DR site
What is the recommend/best practice of the Upgrade .
Whether from CAS or Mailbox and first from DR then HQ.
Request your comments.
Regards
Ashraf
Ashraf