troubleshooting Question

Office 365 Email Address not using custom domain

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motorhogFlag for United Kingdom of Great Britain and Northern Ireland asked on
Microsoft OfficeEmail ServersMicrosoft 365
6 Comments1 Solution124 ViewsLast Modified:
We are deploying Office 365 and setting up a new domain for a new company. There is an on-site AD using the Sync program to sync accounts to O365.

We have a problem whereby everyones default outbound email address is not using our own domain name but is using the one.

In the AD users, the UPN is set to use the correct domain name, in O365 it wont allow us to update the priamry email address, but says to update it on the AD. im not sure where to update this, or waht to do to fix it?

Any help appreciated.

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