support.microsoft.com/en-us/skype/how-do-i-export-or-delete-my-skype-data-84546e00-2fef-4c45-8ef6-3a27f83242cc

reddit.com/r/MicrosoftTeams/comments/y5tli2/change_teams_ringtone_on_android/
itechhacks.com/migrate-chats-from-skype-to-teams/
