Hi all a few queries that i could do with some help on....
We are running clustered Exchange 2013 CU19 at the moment and want to set up a hybrid environment to prepare for the migration of the environment to 365
So Questions
1. Do i need to upgrade to CU 21 ? The following article suggests not
https://blogs.technet.microsoft.com/exchange/2015/09/04/introducing-the-microsoft-office-365-hybrid-configuration-wizard/
2. If it is best to do so does the CU21 upgrade change any database design / configuration? I am asking as we run Virtual environments and if there are any issues with the upgrade i can simply role back the VM; but if the DB's are changed then no!!
3. CU 21 need VS 2013 redistribute and .net 4.7.1 can i install this beforehad in others will CU 19 be OK with these on?
Many thanks