The below links point to Microsoft Help Pages that detail how to delegate your calendar:

• Outlook on the Web (OWA)
  • Calendar delegation in Outlook on the web for business
  • Manage someone else's calendar in Outlook on the web
• Outlook for Windows
  • Allow someone else to manage your mail and calendar
  • Manage another person's mail and calendar items
• Outlook for Macintosh
  • Add and manage delegates in Outlook 2016 for Mac
  • Options for sharing and delegating folders in Outlook 2016 for Mac

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