Issues with adding @mydomain.onmicrosoft.com proxyaddresses

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New Contributor

Greetings,

I have been struggling with this proxy address issue during the past few days and can't seem to find a way around it. Hope you guys can help. So the issue is I'm not able to add @mydomain.onmicrosoft.com proxyaddress entries to my Exchange Online mailboxes. Can't do this from the cloud (users are read-only) or through on-premise AD.

Here's an example: 

- Adding a proxyaddress smtp:john@mydomain.com to local AD works. This entry syncs to the cloud.

- Adding a proxyaddress smtp:john@mydomain.onmicrosoft.com to local AD doesn't get synchronized.

There's no on-premises Exchange set up if that makes any difference.


Any help would be much appreciated!

4 Replies
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Hi Joonas,

 

Have you extended your local AD with Exchange properties ?

 

In your AD Connect do you have selected Hybrid ?

 

You will need both to the extended properties of local AD object to be synchronized to Azure AD and Exchange Online.

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Thanks for the tips, I'm gonna look into it now.

Cheers,
Joonas

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From the On-premise Exchange have you tried?

 

Enable-RemoteMailbox user -PrimarySmtpAddress first.last@domain.com -RemoteRoutingAddress user@domain.mail.onmicrosoft.com ?

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I have same problem. Did you find a solution for this problem?