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Haneef Ibn Ahmad's avatar
Haneef Ibn Ahmad
Iron Contributor
Mar 09, 2018

How to Merge/Consolidate Exchange Online mailboxes?

We're in the process of moving a lot of users from a cPanel-based email server (dovecot server). Since cPanel-based email server does not support email aliases, multiple user accounts were created for the same person.

 

So, for example, John Doe had: j.doe@contoso.com, john.doe@contoso.com and john.d@contoso.com. (Please don't ask me why they needed that many! lol)

 

Now, we'll be doing a mass transfer of all the email accounts from the dovecot server to Office 365/Exchange Online. So, each email will have a new account in Office 365. However, after the transfer we would like to merge all the email addresses for the same person, along with their emails, contacts and calendars, and then assign aliases.

 

How can this merging be achieved? (without using Outlook 2016 to copy each email account's mailbox)

 

Thanking you,

  • Hi Haneef,

    You can use third party tools to do that, you can merge accounts in the destination.

     

    • Haneef Ibn Ahmad's avatar
      Haneef Ibn Ahmad
      Iron Contributor

      Hi Nuno,

       

      Thanks for that.

       

      Will those 3rd party software merge the mailboxes in Exchange Online itself or will it merge on a local machine and then upload it?

       

      Can you suggest me some names for both options please?

       

      Thanking you,

       

      • NunoAriasSilva's avatar
        NunoAriasSilva
        MVP

        Hi Hannef,

         

        It merge to the destination, Ex (You have 3 source email and one destination mailbox). For those 2 options you have Bittitan, among others.

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