Open Shared Sub Calendar Outlook 2025 Not Working. If you go to file → account settings → change [logged in exchange account] → more settings → advanced and add the team's mailbox, it does show the. After you add a shared calendar in outlook desktop, you are not able to select the checkbox next to the name.

Users are unable to open a particular users (user a) calendar after it has been shared with them. Once users click “accept” on the invitation email, user a’s.