08-20-2018 07:59 PM
08-20-2018 07:59 PM
Hi Office365 Community,
I have a client with a really unusual issue. The client in question has sent out a number of meeting invites from their domain 'mycompany.com' and an external client with an entirely separate, unrelated domain (notmycompany.org) has responded to the invite with a message 'on behalf of' the original organiser. For example firstname.lastname@example.org received a response to her calendar invite from 'email@example.com on behalf of firstname.lastname@example.org'. Is this expected behaviour? I have not noticed this myself or with any other clients and I am wondering why this would be occurring. I did not think it was possibly to act on behalf of a company outside of your own domain. Aside from general business these companies are in no way affiliated with one another so should not have the ability to act on behalf of each other. Is this something that should be raised with O365 support directly? The user is running Outlook 2016 for Mac and the client is up to date.
08-20-2018 08:53 PM
I think this is just normal behavior in the following situation:
08-20-2018 09:21 PM
Thanks for your reply @Nestori Syynimaa
In this scenario the invite was not forwarded to another user rather the recipient responded directly to the organiser to say that they could not attend looking like this
I have tested this between office 365 clients internally and I could not replicate the issue. My client is concerned that this person has responded on behalf of herself and want's to verify that this cannot be replicated in any other way. But I cannot confirm this myself as I am unsure of the cause of the issue in the first place.
08-20-2018 10:02 PM
Try to see from message trace where/how the response was delivered. You could also see the response email headers to track the mail delivery.
08-22-2018 04:38 PM
We have checked the headers and cannot see anything out of the ordinary or anything to indicate why the response appears 'on behalf of'. In fact there is no mention of the recipient at all in the header so I am unsure why Outlook displays it this way. Additionally I have checked a third party client and since the 'on behalf of' feature is unique to Outlook it simply shows that the response is from the original sender of the invitation, not the recipient as it should be.
10-07-2018 02:56 PM