Send on behalf of without "New Adress" in From Field

RSEDV 21 Reputation points
2022-06-28T16:35:41.097+00:00

Situation:
User A is a Full Mailbox
User B is a Shared Mailbox

User A as "Full Access" and "Send on Behalf of" rights for User B

Send on Behalf of works fine in Outlook Mobile App and Outlook Web.

Automapping is Disabled for Shared Mailbox

User A and User B are added to Outlook Desktop as "Normal Accounts"

"Send on Behalf of" works only if a new Email address is added in the "From" field.

Both Addresses are visible in the address book.

Are we missing something?

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Accepted answer
  1. Andy David - MVP 109.8K Reputation points Microsoft MVP
    2022-06-28T17:40:56.94+00:00

    Correct, you can't give both as SEND AS will be applied if both SEND on Behalf and SEND AS are enabled. You have to pick one or the other.

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5 additional answers

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  1. Andy David - MVP 109.8K Reputation points Microsoft MVP
    2022-06-28T16:43:10.203+00:00

    Unless I am missing something, that sounds normal. What behavior were you expecting?

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  2. RSEDV 21 Reputation points
    2022-06-28T16:51:36.157+00:00

    Hi Andy,

    first thanks for the quick response

    as both Accounts are added "normal" to the Desktop App, i already have to Adresses "User A" and "User B" in the Selection field for "From".

    I expected that when i select User B and write an Mail that it will be "Send on behalf of" but i get the Massage that i don't have permission to Send on behalf of.
    If i manually add the Address of User B over ->From->Other Addresses and use this one the "Send on behalf of" works.

    So to clarify User A should send Mails on behalf of User B without having to use the pont "Add other Address"

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  3. Andy David - MVP 109.8K Reputation points Microsoft MVP
    2022-06-28T16:59:40.12+00:00
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  4. RSEDV 21 Reputation points
    2022-06-28T17:06:18.503+00:00

    Ah ok so there must be 3 Mail addresses in the end in the From DropDown
    User A
    User B
    And a manually Added User B for "Send on behalf of"

    As I get a "Permission denied" massage this comes as user A only have "Send on Behalf of" and not "Send as" permission ?
    Can I giver user A both permissions or will this lead to complications?

    Again thank you for your quick help

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