Forum Discussion

Abdullah Tahir khan's avatar
Abdullah Tahir khan
Copper Contributor
Dec 15, 2019

Changing Email Domain

Hi,   we are going to change our email domain let say from users@oldname.com to users@newname.com simultaneously all users email accounts will change. How it can be done seamlessly without disturbi...
office 365
Iain Fielding's avatar
Iain Fielding
Brass Contributor
Dec 16, 2019

Abdullah Tahir khan 

 

This comes down to your Project planning, and implementing this badly will effect your users...so make sure you plan this carefully.

 

Things to take in to account:
- Adding newname.com as a domain in the O365 tenant  https://docs.microsoft.com/en-us/office365/admin/setup/add-domain?view=o365-worldwide
- using an exchange address policy to add domain as secondary email address https://docs.microsoft.com/en-us/exchange/create-an-email-address-policy-exchange-2013-help

- At some point you'll then want to switch from old name to new name to be primary email address.. and can be done with the same address policy.

Have a plan for what's happening with users UPN, is that changing too?, this will need to be communicated to your users in advance and worked through. (some times I've seen this change take up to 24hrs to see the change in O365 as well).

Good luck 🙂