I have 1 system that is currently doing the mailbox backup for our on-prem exchange 2016. The OS of the system doing the backup is 2008r2, and is doing it with Outlook 2016. It works and has been working, I just need to have an updated OS doing it.
I created a w2016 system with OUtlook 2013 sp1 (per commvault reccomendations). Did all the setup, registry change to make it so it uses RPC. Turned off 'use cached exchange mode'
In commvault, I added teh new system as a client, added the exchange item as normal.
I go to setup a backup job, it scans and returns all the mailboxes, So i create a job that only backs up mailboxs that start with 'A'....all is looking great.
I start teh backup and it sitts at 'pending' with an error code of 19:1109
THe service account i am using, is the same service account that is being used on teh system that is currently working, so I can't be a permission issue with teh service account.