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.
Send on behalf of without "New Adress" in From Field
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?
5 additional answers
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Andy David - MVP 142.2K Reputation points 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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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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Andy David - MVP 142.2K Reputation points MVP
2022-06-28T16:59:40.12+00:00 Yea, ok I see.
Yep, you have to add it manually, Highlighting userB wont automatically set that as the FROMThere are some exceptions to that:
https://support.microsoft.com/en-us/office/change-the-account-used-to-send-email-messages-2bdd8d4f-e30f-4ec8-88a0-406ce7b23cc5#:~:text=If%20you%20want%20to%20use,Select%20OK. -
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