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Sumayya Aslam
Occasional Contributor

Hello,

My guest users cannot access MS Teams application to collaborate with us. I have Office 365 subscription.

I want to give one of my guest user access to MS Teams, so that we can collaborate. I am the Global admin of my organisation and I have turned on the external sharing and invites for Guests. I have added a gmail guest customer in my office 365 organisation and send her a Microsoft Team invite successfully. But as soon as she opens the link, she sees the below error message. Any idea please?

 

Teams Azure.jpg

14 Replies
Solution
Can you try inviting a completely new guest to your team and seeing if it works? Perhaps a personal address making sure all your browser windows are in private mode.
Agree with Christopher here: try it again with a different user and tell us if it works. So far when I have not had problems inviting external users with a Microsoft account to Teams

Can you maybe post a larger screenshot, I cannot read this one. As far as I can tell, the error message suggest something about "invalid email address", correct?

 

Apart from what the other folks suggested, I would advise that you check the directory for any existing (guest) users with that address.

Hi Christopher Webb, Sure I will make a fresh id today and test it with that. Thank you for responding to my query.

Hi Juan Carlos González Martín, Sure I will make a fresh id today and test it with that. Thank you for responding to my query. I will update you shortly.

Hi Vasil Michev, Thanks for your response.

 

I tested this scenario with two users User 1 and User 2, both users were in my office 365 external users list. I deleted user number 2 from the external user list in office 365 and tested again, but i got the error. Now, I will make a fresh id and test it with user number 3.

 

For the error, it is saying as "

==================================

Welcome to ABC

You have been invited to access ABC's application as.

Sorry, an unexpected error occured. Please contact the person who sent you this invite.

Please contact your admin to ensure you are properly configured in your on-premises AD and you can re-attempt to accept this invite.

OK

==================================

Hi Guys, 

 

I tested the scenario with a fresh email id and it worked.

 

So, I am thinking - that why it didnt work for my users, who were already added in the external user list of office 365.

 

Do I need to delete them from the list first and then add them in teams? or is there any other work around.

 

Thank you for your support.

I checked with Microsoft and they confirmed that I need to delete the external user first from the Office 365 Guest List, and then send them the invite. I tested this scenario and it worked, phew! I am glad - that this issue is resolved now.

Thank you for supporting my post.

Yup, and the reason you might need to remove/re-add users is that they basically "updated" the guest provisioning model, making "older" guests incompatible.

Is there some easy way to do this without deleting all of my 200 contacts I have setup? 

Powershell command to convert existing contacts to modern type of contacts? If only there wouldn't me so much inconsistency between the systems - like the SharePoint guest user that is completely different from the external contact which apparently is now different from the Teams Guest! 

Afaik no, sorry.

Yes, I had to delete all my old external contacts and add them again. It worked then.

Did you remove them on the contacts section and add them in the team or remove them in the contact section and readd them on the contact section. 

I deleted them from the Guest Users List, from the Office 365 admin centre.