Forum Discussion
Can Office 365 groups be used to assign Exchange folder permissions?
Can I assign Exchange folder permissions based on an Office 365 Group?
Can I, for example, assign Reviewer permission to my calendar for an Office 365 Group? Thanks jcgonzalezmartin
O365 groups are not security principals, you cannot use them to assign permissions. In ExO that is, I think Juan is probably thinking about SharePoint again :P
In Exchange Online, you can get a list of all security principals via Get-SecurityPrincipal