Enabling a delegate to share permissions in a team calendar

Hi Whalen, Thomas F

Based on my research, a delegate does not have permission to share the calendar with other users. The ability to grant or modify sharing permissions is typically limited to the mailbox owner or performed by an administrator. 

If your goal is related to improving team collaboration, you may consider using a Microsoft 365 Group. This approach provides a shared calendar experience, and the group owner can manage members and access more effectively. 

For your reference: 

• Share and access a calendar with edit or delegate permissions in Outlook - Microsoft Support 
• Microsoft 365 Groups overview for administrators - Microsoft 365 admin | Microsoft Learn 

I hope this provides additional insight. 

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