Forum Discussion
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...
Yes you can use the UPN as it will carry over when syncing along with your primary e-mail and it needs to be added as a domain to the tenant. You can use Passthrough without exchange onprem but i would recommend keeping one as it makes administration easier. Many others have removed their exchange servers and do their admin through AD attributes so it's optional. Until you plan to completely remove AD sync and stand alone in 365 in the future I would say keep it around.
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?
- 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.
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.
- 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.