Company Rebrand - How does on-prem domain name change work and M365 Entra/Entra Sync?
Posted by Fizgriz@reddit | sysadmin | View on Reddit | 11 comments
Company needs to rebrand.
How do i handle a domain rename and how does that work with entra sync? Should i just leave it, and add email aliases?
What have others done? Should i hire a MS consultant?
disclosure5@reddit
Domain renames are explictly unsupported in a range of situations. It's far more pain than it's ever worth.
If a whole new domain and user migration sounds like too much effort.. just leave it and add aliases.
AcousticNut@reddit
This right here. We looked at options extensively after our rebrand and this was the only viable one.
Zedilt@reddit
Once did a domain rename, never again.
ZAFJB@reddit
Why rename the domain?
You can hide everything behind UPNs and DNS
rfc968@reddit
In the middle of one right now.
Import for you to know: Easiest if the Entra UPN change happens while the user device is shut down. Not in standby or deep sleep. Shut down. With at least 1h between change and user login.
OneDrive URL changes with Entra/M365 UPN change and it will break permissions on OneDrive shared files. Think Teams Chat(-group) files or manual sharing of files in OneDrive. OneNotes (Desktop App) stored in „normal“ OneDrive must be closed and reopened (best done via Online OneNote & „open in Desktop App).
MS Teams shits the bed with OneDrive as well. Just kill the profile and have users manually try to send any one person a file via Chat. Second try will work and Teams now must be restarted. Tell them to do a PC Reboot. OneDrive is usable once more for Teams without a 404 not found error afterwards. Make sure you provisioned the new graphics and themes beforehand in Teams AdminCenter.
Some external applications can not handle a difference between primary E-mailaddress and Entra UPN, such as DocuSign if you activated SCIM for user provisioning.
Other applications will create a new user account for the „new“ username. Lusha is such an example. Contact the support of all platforms integrated in used in your Entra Enterprise Applications (and Application Registrations).
If Windows Hello for Business is used: have the users re-register PIN and everything else.
For your onPrem Domain: add the new suffix and migrate the users over. Should be no problem. There is no need to rename the main domain name itself. Unless you really want to.
rfc968@reddit
And thanks to @JimmyMcTrade, TIL about SharePoint rebranding. Will be interesting to see if it also works if only the tld/suffix changes. https://learn.microsoft.com/en-us/sharepoint/change-your-sharepoint-domain-name
St0nywall@reddit
Here are a few steps you can try. Easy enough to do with a virtual domain and free 365 tenants.
AppIdentityGuy@reddit
Absolutely hire someone. This can get very messy
inflatablejerk@reddit
Easy way, create an alternative upn suffix. Switch everyone to that. Update any email address policies.
JimmyMcTrade@reddit
Ya. And while you're at it change the SharePoint default domain. This will also force you to get an alternate onMicrosoft domain
Few-Presence5088@reddit
I wouldn’t do a domain rename. If you have to, setup a new forest and migrate users over if it’s that big of a problem, otherwise just setup a new UPN for everyone.