Users cannot modify shared calendar Color Categories

Issue

Office 365 / Exchange Online users cannot rename, edit, or add new colour categories for shared calendars even when they have full editor permissions. All edit options are greyed out.

Calendar Colour Categories

Shared Calendar Permissions

Resolution

This seems to be by design. To avoid the issue, the calendar account needs to be added to Outlook directly (as a user's account), not as a shared calendar.

November 2021
MS Office 365

 

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