Customer is going through an exchange migration in a 2016/2010 coexistence upgrade. Didn't get 2016 patched in time for the Zero Day exploits & want to apply the patches, but I need to move them from cu16 to cu19 & they still have about 1/2 the mailboxes on 2010.
Little concern the AD/Forrest scheme changes might impact 2010
I going to assume since 2010 is EOL... there is going to be no support for 2010. (it's on the latest 2010 cu)