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BrainStorming
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Sending Response to A Meeting Request goes to A Different E-Mail than the Sender!

I have noticed that one of the users if he sends me a Meeting Request and I send a Resposne after acceting it, the resposne goes to a different e-mail address than than the sender!!

The e-mail address sent to, was an old test ID created for some time but deleted.
so I get the delivery failure error:
Delivery has failed to these recipients or distribution lists:

IT-Test
The recipient's e-mail address was not found in the recipient's e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your system administrator


Secondly, if I edit the Reposne before sending it, I can see cleary it has the correct sender's address in the TO: field
and when I checked the user's ID (the sender) object on Active Directory, everything was fine with it..

Any clue?!!
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BrainStorming

8/22/2022 - Mon
Manpreet SIngh Khatra

Not sure if these is additional email added or there is some Customization for ReplyTO address

- Rancy
Muralidharan R

Can you clear the outlook cache and try!

Below are the few suggestions to check.
1) Accept the meeting in OWA and check.
2) Try to send a test email to the email address and check.
3) Also you could see in the outlook contact, if they have added the old emails address as Secondary smtp.
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BrainStorming

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because its the solution and found after deep troubleshooting.


Please advise if not acceptable..
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