Hybrid Exchange deployment with OWA disabled.

brichardi 311 Reputation points
2021-04-30T18:37:08.223+00:00

Hello all,

We are in the early process of deploying hybrid exchange. My question is will these items cause issue with the Exchange migration.

Our environment:
Exchange 20116.
User UPN is not routable (i.e myworkdomain.com).
OWA is disable.
User account still has the obsolete format such as "ss_jsmith".

What item(s) do I need to fix before deploying hybrid Exchange.

Note: I know running ldfix will find issue with AD, but there are some issue with Exchange as indicate above.

Thanks

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Accepted answer
  1. KyleXu-MSFT 26,196 Reputation points
    2021-05-03T01:47:31.587+00:00

    @brichardi

    OWA disabled and "ss_jsmith" doesn't effect the migration of mailbox.

    But, about the UPN, If you want to use it on Exchange online, you need to verify this domain on Office 365 first. If you doesn't add this domain to Office 365 or this email address isn't a real/owned domain, mailboxes email address will because default email address(@keyman .onmicrosoft.com) after migration.


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