Microsoft Teams meeting : how Teams search for attendees ?

[LaurentF1000]

My config is as follow :

- My email system (@mydomain.com) is onprem

- I have validated @mydomain.com in Office365

- In Exchange Online, I've turned @mydomain.com as "internal relay" instead of "Authoritative"

- I've created Off365 user accounts for 5 people, who will organize Teams meetings, using the default .onmicrosoft.com domain name

- I've assigned O365E1 licenses to these 5 people with Exchange and Teams Service plans enabled

- I've created other company employees as MailEnabled contacts in Office 365

When these 5 people try to organize (from Teams) a Teams meeting, they can't invite other users : Teams display "No results found. Check spelling or try another name." when organizer enter email address or displayname in the attendees fields.

So I was wondering which query does Microsoft Teams send to the directory. Which attributes need to be valued for the query to work ?

Any help will be appreciated.

Thank you,

[#2 · Accepted solution]

AFAIK they need to exist in your AAD directory as users. Are these mail enabled users hosted on premises?

[#3]

@adam deltinger In my first attempt, they were mail contacts (hosted onprem) in AAD.

I just did another test with them as mail enabled users in AAD, and you are right, now I can invite them to Teams meetings (I can't invite mail enable contacts)

So it's easier to invite a user perfectly unknown (which doesn't exist in AAD) than a colleague defined as a mail-enabled contact.

Really strange behaviour.

Thank you,

Laurent