How to change a an email address in a user o365 account

I have a user that has a miss spelling of his ID for one of the "other email addresses" in o365 admin console. How can I change this,as I cannot edit it from the console. Can I use powershell?

This is the address "userID@domain.onmicrosoft.com"
rdefinoAsked:
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Vasil Michev (MVP)Commented:
Are you using dirsync? You will not be able to edit the alias if you are syncing with your local AD. Otherwise, you can change it with something like this:

$aliases = (Get-Mailbox userID@domain.onmicrosoft.com).emailaddresses
$aliases.Remove("smtp:userID@domain.onmicrosoft.com")
$aliases.Add("smtp:newuserID@domain.onmicrosoft.com")

Set-Mailbox userID@domain.onmicrosoft.com -EmailAddresses $aliases

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rdefinoAuthor Commented:
We do use dirsync. I check Ad and cannot find a way to edit it.
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Vasil Michev (MVP)Commented:
It's not in AD. Pretty much the only certain way to get rid of it is to disable dirsync and edit it.

You can try adding the @onmicrosoft.com alias in AD, syncing, and then removing it. No guarantees it will work though.
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rdefinoAuthor Commented:
Where would I add @onmicrosoft.com alias in AD? I don't have an email addresses tab.
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Vasil Michev (MVP)Commented:
Attribute editor -> Proxyaddresses
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