Forum Discussion

Copper Contributor

Nov 21, 2018

Question regarding UPN and AD pass through

Hello and pardon the question if I missed the answer elsewhere. We are finally migrating off on prem to O365. I would like to use pass through authentication but have questions about the UPN, pub...

office 365

meanoldmanning

Copper Contributor

Nov 21, 2018

Second question re. your reply - keeping an exchange server on prem, it's just acting as a management console basically since non of the mail data is stored locally nor does it pass through that server, correct? So I could set up a tiny VM with just Exchange whatever version installed and not have to worry about space for the data, nor CALs since the client licenses are now O365?

ChrisWebbTech

MVP

Nov 21, 2018

After migration you could. Check out hybrid license thou cause the server still needs a license. It’s free, if you already have an exchange license thou you can still use that but eventually you’ll want to change. But your right no cals needed if moved to cloud and used for management only. Just server license being what you had or new server with hybrid.

meanoldmanning
Copper Contributor
Nov 27, 2018
We're licensed for Business Essentials, not E3 or better, so I don't think I can use the free key. I have an entitlement to on prem Exchange 2016 though, but not enough CALs for every user at that level. I'll have to investigate my options further. It may wind up we elevate to E3.
- ChrisWebbTech
  MVP
  Nov 27, 2018
  You shouldn't need CAL's if you don't host mailboxes, the only thing you need licensed on prem is the server software itself.
  - meanoldmanning
    Copper Contributor
    Nov 27, 2018
    Excellent! That's what I was just trying to look up. I got very confusing info about that from the tech were are using to assist.
    Thank you very much