Hello all,
I have exchange server 2013 sp1, i need to upgrade it to CU23. Can i do it directly or i have to do intermediate upgrade first.
Exchange OS: 2012r2
AD OS: 2012r2
Forest\ domain function levels: 2008
I need also to install exchange 2019 cu9 "coexistent" for awhile and migrate all mailboxes to exchange 2019. should i upgrade current forest\ domain function levels or it gonna work.
for exchange 2019 cu9, what IE or chrome version should i use (install or update to latest version)
Thank You