Restore Outlook's Classic Permissions Dialog

Last reviewed on February 18, 2021 1 Comment

Applies to: Outlook 365 (Win)

Outlook has a simplified Permissions dialog, which is used on folders in Exchange accounts in your profile. Shared mailboxes and subfolders use the old "classic" permissions dialog.

The simplified dialog makes it clear what the permissions do, but it lacks the ability to customize the permissions or give another user Owner permissions.

To create custom permissions or to give another user Owner permission, you need to use the classic permissions dialog.

This registry key was added to Office in version 1903 to bring back the classic permissions dialog.

HKCU\Software\Microsoft\Office\16.0\Outlook\Options\Calendar\
DWORD: ShowLegacySharingUX
Value: 1

ShowLegacySharingUX

More Information

The Exchange administrator can set permissions on mailbox folders.
Add-MailboxFolderPermission (ExchangePowerShell) | Microsoft Docs

About Diane Poremsky

A Microsoft Outlook Most Valuable Professional (MVP) since 1999, Diane is the author of several books, including Outlook 2013 Absolute Beginners Book. She also created video training CDs and online training classes for Microsoft Outlook. You can find her helping people online in Outlook Forums as well as in the Microsoft Answers and TechNet forums.