Hi,
I have a multi-site, multi-DAG, Exchange 2010 and Exchange 2013 CU5 installation. All servers are multi-role. We are about to commence a server update to CU7 for all of the Exchange 2013 Servers.
What is the Microsoft supported order in which to upgrade the servers?
Can I do the upgrades over a number of nights, does everything need upgrading together, should I do it site at a time or a DAG at a time?
Are there any TechNet articles which explain the supported method? It is important that during the update to CU7 the installation stays in a supported configuration.
Thanks in advance.