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Dan_Snape's avatar
Dan_Snape
Steel Contributor
Dec 04, 2017
Solved

On-prem mailbox with Online archives

Can anyone let me know what type of user the Exchange Online user is when the users primary mailbox is on-prem (Exchange 2010) and the archive is located in Exchange Online? At the moment we have s...
exchange online
Exchange Server
hybrid
  • Dominik Hoefling's avatar
    Dominik Hoefling
    Dec 05, 2017
    If you are in a hybrid configuration, you can assign Exchange Online Plan 2 or Exchange Online Archiving to enabling archiving features. You can assign licenses for on-premises mailboxes as well, no (online) mailbox will be created additionally. This was the case a long time ago ...

    To answer your question about the recipient type in Exchange Online: it is a mail user with archive enabled. You can check it with Get-MailUser <cloud mail user> | FL *archive*
Dan_Snape's avatar
Dan_Snape
Steel Contributor
Dec 04, 2017

Yes there is a hybrid setup in place. I have read that technet article, but it doesn't explain what user type the Exchange Online user is when the primary mailbox is on-premises and the archive is in Exchange Online.

Loryan Strant's avatar
Loryan Strant
MVP
Dec 04, 2017
Do you actually have "Exchange Online Archiving" licenses though? Or just the usual Exchange Online / Office 365 E3/E5 licenses?
  • Dan_Snape's avatar
    Dan_Snape
    Steel Contributor
    Dec 05, 2017

    All users have been assigned O365 E3 licenses

    • Loryan Strant's avatar
      Loryan Strant
      MVP
      Dec 05, 2017
      As mentioned previously, "Exchange Online Archiving" is different from archiving for Exchange Online users. The naming is confusing I know.
      If you want to have an archive for on-prem mailboxes, then you need that license.
      Otherwise what is happening is that by assigning an E3 license you are creating a full Exchange Online mailbox - which can cause issues.
      I would also suggest that you reach out to Microsoft FastTrack to help with your migration planning as they are a free resource.
      • Dominik Hoefling's avatar
        Dominik Hoefling
        MVP
        Dec 05, 2017
        If you are in a hybrid configuration, you can assign Exchange Online Plan 2 or Exchange Online Archiving to enabling archiving features. You can assign licenses for on-premises mailboxes as well, no (online) mailbox will be created additionally. This was the case a long time ago ...

        To answer your question about the recipient type in Exchange Online: it is a mail user with archive enabled. You can check it with Get-MailUser <cloud mail user> | FL *archive*

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