How to grant or change Outlook calendar permissions

SUPPORTED TENANTPILOT TASK · Fictional examples · Updated October 2026

Choose an appropriate permission level

• AvailabilityOnly: view free/busy information.
• Reviewer: view calendar entries without editing.
• Editor: view and modify entries.
• Owner: a broader role that should be tightly controlled.

Grant access

1. Identify the calendar owner and the colleague who needs access.
2. Check whether the calendar is shared already to avoid duplicating or overriding permissions.
3. Choose the least-privileged permission level that meets the need.
4. Grant the permission in Outlook or Exchange Online using an approved administrative method.
5. Verify access from the other user’s perspective.

Exchange Online PowerShell example

Add-MailboxFolderPermission -Identity "[email protected]:\Calendar" -User "[email protected]" -AccessRights Reviewer

The actual calendar folder name can vary by mailbox language and configuration. If permission already exists, use the appropriate change operation instead of blindly re-adding it.

Where TenantPilot fits

TenantPilot provides tasks to grant, change, remove and inspect calendar permissions. It helps clarify the requested access level before an authorised change is made.