Outlook calendar missing owner permissions

[chadrodrigo]

Recently I discovered that that ability within OL 2019 via M365 calendar properties when adding a user as an owner or custom doesn't show any longer. All I get is four radial buttons when adding a user. Does anyone know how to make someone an owner from OL calendar please?

[#2 · Accepted solution]

That's the expected behavior now. If you want "custom" levels, use PowerShell. Or use a reg key to bring back the old dialog: https://www.slipstick.com/outlook/calendar/restore-outlooks-classic-permissions-dialog/

[#3]

You can restore the classic permission options by creating the Following Dword in RegEdit.
HKCU\Software\Microsoft\Office\16.0\Outlook\Options\Calendar\
DWORD: ShowLegacySharingUX
Value: 1