Hello Team, We are trying to change primary email address in Office 365 as per email policy. For some reason Office 365 ECP portal is not allowing us to make changes. We are currently following below mentioned process as a global administrator of our organization to change a primary email address. login to the exchange admin center (outlook.office365.com/.../) with the admin account. click recipients > mailboxes. select the mailbox and edit it. click email address, select the email address which you want to edit and click the pencil icon. check make this reply address and save. Your reply will be highly appreciated.

Seems to work fine here mate. Are you getting any error message or? Don't forget that for a synchronized user, the change must be made in on-premises AD, not the cloud. You can always use PowerShell too.

@Vasil Michev Thank you. The solution provided worked for me. Have a great week ahead!

Change Primary email address via Exchange Online ECP portal.

Gurudas 926

Hello Team,

We are trying to change primary email address in Office 365 as per email policy. For some reason Office 365 ECP portal is not allowing us to make changes.

We are currently following below mentioned process as a global administrator of our organization to change a primary email address.

login to the exchange admin center (outlook.office365.com/.../) with the admin account.
click recipients > mailboxes.
select the mailbox and edit it.
click email address, select the email address which you want to edit and click the pencil icon.
check make this reply address and save.

Your reply will be highly appreciated.

Jame Xu-MSFT 4,176 Reputation points

2022-11-11T08:03:57.573+00:00

Hi @Gurudas ,
Are you using a hybrid environment? What error messages are being reported?
Have you tried the methods provided by michev? If it helps you, you could mark it as an answer, thank you!

Accepted answer

Vasil Michev 109.4K Reputation points MVP

2022-11-10T08:24:38.45+00:00

Seems to work fine here mate. Are you getting any error message or? Don't forget that for a synchronized user, the change must be made in on-premises AD, not the cloud.

You can always use PowerShell too.
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1 person found this answer helpful.
Gurudas 926 Reputation points

2022-11-14T07:01:02.643+00:00

Hello @Vasil Michev and @Jame Xu-MSFT ,

So if we make the required changes in proxy attribute for primary SMTP address then run the Azure Ad Connect sync we will be able to change the required attribute successfully.

Please confirm.

I do appreciate your help @Vasil Michev and @Jame Xu-MSFT . Have a great day ahead!

Vasil Michev 109.4K Reputation points MVP

2022-11-14T07:58:28.473+00:00

Yes, that's the correct approach for any synchronized user.
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Gurudas 926 Reputation points

2022-11-24T13:17:06.097+00:00

@Vasil Michev Thank you. The solution provided worked for me. Have a great week ahead!
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