We have a Universal Distribution Group entry with an email address - we call it udg@example.com
.
This item has two members [we call them MemberA
and MemberB
] which receive in their inbox emails sent to udg@example.com
. That far this works perfectly for years.
When for example MemberA
wants to reply to an email sent to udg@example.com
[which has been delivered into his Inbox
] then I have to change the sender address in the From
field [udg@example.com
is selected from the place displayed as red box]:
Since couple of weeks [I suspect a Microsoft update] I have this very weird behavior:
Very often, too often, the email is rejected by our Exchange with the name of the recipient and that I am not allowed to send on behalf of an other user - but we are not sending it on behalf of
!
When we go to the Sent Items
folder, press Forward Email
, select udg@example.com
in the From
field then it works!
Here two screenshots how it appears in the Sent Items
box:
1) The first try when the email gets rejected. It is in German but you can see it has been sent on behalf of
.
And then few seconds later, with exactly the same procedure and same data the email can be sent - you see the on behalf of
is missing and therefore it works.
Note: I replaced in the screenshots the real content with samples so it is more understandable.
What confuses me totally is, that mostly the first time the email tries to be sent on behalf of
and then few seconds later not.
My question:
What can I do to disable/avoid the on behalf of
mechanism?
- Exchange 2010
- SBS 2011 Standard
- Outlook 2013
Replies to comments:
- A shared mailbox isn't option.
- Cache mode is disabled.
- SBS has been restarted several times.
- For the both users
MemberA
andMemberB
send on behalf is set in the distribution group forudc@example.com
.