Cannot Open Shared Calendar Outlook 2025 App

Cannot Open Shared Calendar Outlook 2025 App. After you add a shared calendar in outlook desktop, you are not able to select the checkbox next to the name. After sharing your calendar, have recipients review the following information about opening shared calendars.

I instructed them to accept the shared calendar email using the mobile app,. I have a user that is trying to add one of our shared calendars.