Expected behaviour when sharing files in a meeting with external users

ChristianJBergstrom thanks for your input again and not giving up 🙂

would you mind being more precise as what you need to get an answer for?

If sharing files in a Teams meeting with external (not guests) is supposed to work.

The use case is pretty common actually. You organise a meeting and invite some internal users and some external users. You then share a file in the chat and would like that everyone can access the file

At this point it seems that the answer is that external users cannot access the file that has been shared.

And.. when it comes to meetings and sharing files this piece explains it pretty good

How to Share Files in Teams Meetings - It's Different to Outlook - Office 365 for IT Pros (office365...

After the meeting is created, any tenant user can upload files to the Files section of the Teams meeting workspace. Invitees outside the organization can’t share files in this way. However, they can share links to documents through chat after the meeting starts (they’ll have to make sure that the links grant access to meeting participants).

This kinda confirms that tenant users can access files shared in the chat (he calls it meeting workspace) but external users not

I think this is the most comprehensive article for guest sharing reference

Microsoft 365 guest sharing settings reference | Microsoft Docs

This is about Guest access, completely different use case. Guests have an account in the inviting tenant and have access to tenant resources 

Noticed you asked a similar question in February

That one is not about Teams meeting thought. I replied now to that thread and disagree