Occasional Contributor

So this should be dead simple but I cant seem to get it to work.


So we have guest users in O365. Call it a@b.com.


We schedule a meeting and enter the email address of the guest user in the Invite attendees box. The guest user receives the invitation fine. But when they click the link it says "only people with access to this orgs can access its meetings".  The only way to get this to work is to turn Anonymous access on in Teams admin, but I dont want to do that because students are then copying the meeting link and inviting their mates in, even with lobby turned on, the teacher may let in someone who isnt a student here.


So how on earth can I have a guest meeting whilst having anonymous access turned off?

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