Teams - When inviting externals they don't receive invitation e-mail or calendar event

Martin Dröge 1

Been having this issue for a while now. Does anybody have a fix?

Thanks!

Kael Yao-MSFT 37,676 Reputation points Microsoft Vendor

2022-10-26T02:40:38.217+00:00

Hi @Martin Dröge

Does this issue occur on different recipient domains (for example, user1@harsh.com .com, user2@Stuff .com)?
Are you trying to invite the guest user to a meeting?

To troubleshoot this issue, please also involve your Exchange admin to access Exchange Admin Center>Mail Flow>Message Trace and check if you may see the meeting invitation email in the search results.
Martin Dröge 1 Reputation point

2022-10-26T13:06:48.257+00:00

Yes it does and I am trying to invite a guest user to a meeting. It happens all the time.

I've been in touch with MSFT help in the past and the temporarily solution was to manually change the name of a folder in a map on my laptop.

I've checked the message flow and waiting for downloadable report at this moment
Kael Yao-MSFT 37,676 Reputation points Microsoft Vendor

2022-10-28T02:33:47.867+00:00

Thanks for the update.

If any further update on this issue, please feel free to post back.
Martin Dröge 1 Reputation point

2022-10-31T09:50:18.337+00:00

I've downloaded it. Quite some fails in sending: 95% is gmail adressess, sometimes when sending to unique domains.

An example: 2022-10-20T17:26:46.9355528Z,"martin@objeqtive.nl","######@Stuff .com##Receive, Fail","Frits / Martin - AFPRO","38550","<DB9P192MB15644AD992425F8A358F31C4A62A9@DB9P192MB1564.EURP192.PROD.OUTLOOK.COM>","76cb869b-219d-4c9c-1008-08dab2c043ec","52.113.205.203","Originating","","Normal"

BTW: I use chrome incognito and therefore am not always signed in on my microsoft account online. I send the invites through the teams-app in windows.
Kael Yao-MSFT 37,676 Reputation points Microsoft Vendor

2022-11-01T03:36:51.16+00:00

Hi,
This seems to be the Enhanced summary report.

Have you also downloaded the Extended report?Which may include more detailed information.

If yes, please search for FAIL event in the event_id field and check the corresponding recipient_status field. It may indicate the reason why the delivery failed.

Example:

1 answer

Muhammad Bilal Ashraf Rajput 1 Reputation point

2022-10-25T07:32:37.763+00:00

Hi @Martin Dröge ,

Please also check the junk folder.

This is the similar thread with link below.

Please follow the instruction in this thread to resolve your issue.

https://learn.microsoft.com/en-us/answers/questions/115463/teams-calendar-external-meeting-invites-not-workin.html
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Martin Dröge 1 Reputation point

2022-10-25T07:36:08.24+00:00

Hi Muhammed, thanks for your response!

I don't think this is the same problem. My recipients often don't receive anyting at all (so no e-mail or calendar-event). Even not in the junk mail. So it looks like things are going wrong on the 'outbound' side of of MS teams?
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Teams - When inviting externals they don't receive invitation e-mail or calendar event

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