Hi @JulieMardersdw214 ,
Can we share screen (both ways) with users which are "Guest".
Yes, you can. By default, the guest users are able to share screen both ways:
And if you want the guest users to be able to give or request control when presenting screen, you would need to configure the settings as mentioned in the links shared by michev.
Furthermore, in case you find the guest users not able to share screen in a meeting, you can check if they are assigned the attendee role which does not have the permission to share content. See Roles in a Teams meeting.
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