Automapped mailbox - Migration

Question

Hi everyone.&nbsp;We're looking at an AD consolidation project moving users from one internal forest to another with 1 o365 tenant in the cloud.&nbsp; Multiple forest on prem to 1 O365 tenant.&nbsp;&nbsp;&nbsp;We're moving users from forest 1 to 2 and when we move the shared mailboxes and users, we're looking at how to know who has the mailbox automapped and who doesn't.&nbsp; &nbsp;Never had a good answer from MS on this.&nbsp; Does anyone know how to tell if a users is automapped or not?&nbsp;&nbsp;Tagging&nbsp;Vasil Vasilev&nbsp; as I know he's played with this a bit from previous posts.&nbsp; Thanks in advance all. Brian&nbsp;

hidmov · Answer

Hey&nbsp;CoopBK&nbsp;&nbsp;My understanding is the automapping data is stored with the AD user under&nbsp;msExchDelegateListLink&nbsp;Get-ADUser "Mailbox01" -Properties msExchDelegateListLink | Select msExchDelegateListLink&nbsp;The above should show you which users get the Mailbox01 automapped in Outlook, but I'm away from my lab and unable to test right now.&nbsp;Hope this helps&nbsp;Cheers,Mark

vasilmichev · Answer

The&nbsp;MSExchDelegateLinkListBL is the "reverse" attribute, which will give you a list of all the mailboxes a given user has automapped.&nbsp;

coopbk · Answer

So all the mailboxes are in office 365 so is there a way to see it then?&nbsp;VasilMichev&nbsp;

vasilmichev · Answer

Nope. At least not a supported way. You can use the method I've outlined here, but that requires you to add folder-level permissions:&nbsp;https://www.michev.info/Blog/Post/1926/peeking-behind-the-curtain-of-exods-fetching-the-adrecipient-object
&nbsp;
In any case, you can simply report on the Full Mailbox permissions instead and assume they're all with automapping set to $true.

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Automapped mailbox - Migration

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