Re: Select office 365 group or user in combo box.
@Anonymous ,
This is what was crosses my mind:
ClearCollect(users,ShowColumns(Office365Users.SearchUserV2({searchTerm:""}).value,"DisplayName","Mail"));
Collect(users,RenameColumns(ShowColumns(Office365Groups.ListOwnedGroupsV3().value,"displayName","mail"),"displayName","DisplayName","mail","Mail"))
In this way you will have into a collection all Users and the Groups (that the current user is member/owner of) with 2 columns ...DisplayName and Mail. I hope that this is enough info.