Exchange Management Console Send on Behalf of Error

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We recently migrated from Exchange 2003 to 2010 (completely new server, et al), and opted to not migrate over some mailboxes of users that are no longer with our organization — makes sense, right?

Well, it does, up until one of those users still had “Send on Behalf of” rights for a shared mailbox… which doesn’t cause an issue until you try to give a new user “Send on Behalf of” rights to that mailbox… When I tried, I got the following error:

Microsoft Exchange Error:

The following error(s) occurred while saving changes:

Set-Mailbox Failed Error:

Couldn’t find object “domain.local/OU/username”. Please make sure that it was spelled correctly or specify a different object. Reason: The recipient domain.local/OU/username isn’t the expected type.

The solution:

On the Exchange server, ADSI Edit (Start > run > ‘adsiedit.msc’), connect to the domain (if it’s not already connected), navigate to the OU / user you’re trying to grant the permissions for (in my case the shared mailbox user), Right click > Properties, find the publicDelegates setting, edit it, and remove the user being referenced — et voila!

11 Comments

  1. Doug Handley
    Oct 02, 2015 @ 04:08:47

    Perfect Solution

    Reply

  2. jeff
    Jan 07, 2016 @ 12:38:44

    Awesome worked for me as well.

    Reply

  3. John
    Jan 13, 2016 @ 13:16:15

    Thanks for this. Nice simple solution that worked.

    Reply

  4. Chet
    Jan 30, 2016 @ 00:22:32

    It’s awesome for me to have a site, which is useful in favor of my know-how.
    thanks admin

    Reply

  5. Anil
    Feb 03, 2016 @ 10:39:59

    Excellent! Simply explained and worked perfectly. Thank you very much!

    Reply

  6. Bazup
    Apr 29, 2016 @ 01:50:49

    Thanks worked perfectly!

    Reply

  7. Indika
    Jun 21, 2016 @ 08:56:10

    Thank you.. This helped me…!

    Reply

  8. Salman Saleh
    Jun 24, 2016 @ 09:19:30

    Thanks alot

    Reply

  9. Jody
    Aug 04, 2016 @ 13:58:02

    Didn’t work. Both were already . What else have you got?

    Reply

    • Jody
      Aug 04, 2016 @ 13:58:56

      Sorry, both were not set. What else have you got?

      Reply

      • tbare
        Aug 04, 2016 @ 14:44:31

        Both what were not set? What version of Exchange, and is it the exact error as above?

        Reply

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