troubleshooting Question

Configuring DAG with different CU level ?

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Senior IT System EngineerFlag for Australia asked on
ExchangeEmail ServersActive DirectoryMicrosoft Server OS
6 Comments3 Solutions835 ViewsLast Modified:
Hi All,

I've got multiple Exchange server 2013 Standard mailboxes scattered around 3 different AD sites (same domain).

AD Site 1 - PRODEXC1-VM - Mailbox Server &CAS Role - SP1
AD Site 2 - PRODMBX01-VM - Mailbox Server  - SP1
AD Site 3 - PRODEXC2-VM - Mailbox Server &CAS Role - SP1+CU3

I'd like to deploy additional 3x Mailbox server on each site so that I can build DAG for each AD site.
As I read today, the latest CU is CU16, so can I install the new 3x mailbox server above with CU16 while the other is still as is ?

This is to avoid any outage.
Tim Edwards
IT Team Lead - Unified Communications & Collaboration

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