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Carlos Gomez's avatar
Carlos Gomez
Brass Contributor
Jun 14, 2017
Solved

Create shared mailbox on Hybrid environment - directly on O365 or onpremises then migrate it to O365

Hi,   What is the recommended way to create shared mailboxes for a hybrid environment? There are some issues if you create them directly to O365 - https://support.microsoft.com/en-us/help/3129334/u...
exchange
hybrid
  • NunoAriasSilva's avatar
    NunoAriasSilva
    Jun 14, 2017

    Hi Carlos,

     

    If you have an Hybrid, your autodiscover is pointing to your on-premises Exchange. If you create your Mailbox only in Cloud, your AD and Exchange does not have any propreties of that mailbox, that is the issue.

     

NunoAriasSilva's avatar
NunoAriasSilva
MVP
Jun 14, 2017

Hi Carlos,

 

If you still have mailboxes on-premises and would like to have access to your shared mailboxes you should create on-premises and then migrate to Office 365.

  • Carlos Gomez's avatar
    Carlos Gomez
    Brass Contributor
    Jun 14, 2017

    Hi Nuno,

     

    My mailbox is already migrated to O365 from a while a go, but tonight I tested creating to shared mailboxes. One directly on the cloud and the other on-premises (then migrated), after applying the full access permissions on both for my account only the second one is working (including auto mapping)

     

    I was expecting that for both shared mailboxes to work, but apparently the ones created directly on the cloud have some issues with delegation.

     

    https://support.microsoft.com/en-us/help/3129334/users-in-a-hybrid-deployment-can-t-access-a-shared-mailbox-that-was-created-in-exchange-online

     

    So, I assume that create the shared mailboxes on-premises and then migratem is the best solution even if we have all of our user mailboxes migrated.

     

     

    • NunoAriasSilva's avatar
      NunoAriasSilva
      MVP
      Jun 14, 2017

      Hi Carlos,

       

      If you have an Hybrid, your autodiscover is pointing to your on-premises Exchange. If you create your Mailbox only in Cloud, your AD and Exchange does not have any propreties of that mailbox, that is the issue.

       

      • Jerry Meyer's avatar
        Jerry Meyer
        Iron Contributor
        Aug 30, 2017

        What Nuno says is correct, but when you have migrated everything with the hyrbid your autodiscover will propably point towards Office 365 and you exchange hybrid server is just a exchange server for managing purposes. When this is the case the best thing to do is create the shared mailboxes online (just cloud only).

        But if you still have users onprem and maybe some online then the method nuno told is the way to go. Also make sure the proxyaddress have sharedbox@domain.mail.onmicrosoft.com (this is used for the automapping).

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