Allow a user to have delegate to a mailbox so they can track emails from mailboxes other than their own:

https://learn.microsoft.com/en-us/dynamics365/outlook-app/enable-delegate-access

This enables users to track emails/records from a ‘shared mailbox’ although it needs the corresponding Microsoft 365 account of the shared mailbox to be a user account with the relevant Dynamics 365 licence.

• Enable the settings via the OrgDb editor solution OrgDBOrgSettings TrackAppointmentsFromNonOrganizer and DelegateAccessEnabled.
• Open the user/shared mailbox account and share via delegate access the calendar https://learn.microsoft.com/en-us/exchange/troubleshoot/outlook-issues/cannot-view-outlook-delegates-page