Publish Calendar option is missing from Calendar settings in Outlook on the web in Microsoft 365

Original KB number:   3187580

Symptoms

Microsoft 365 users can't publish their calendar in Outlook on the web because the Publish calendar option is missing from Calendar settings.

Cause

This problem can occur if the Anonymous domain isn't set in the sharing policy that's assigned to the user.

Resolution

To resolve this problem, follow these steps:

1. Determine the sharing policy that's assigned to the user.

   1. Connect to Exchange Online by using remote PowerShell. For more information, see Connect to Exchange Online PowerShell.

   2. Run the following command, and note the policy that is returned:

      Get-Mailbox User1 | fl *sharing*
      

2. Update the sharing policy for the user. To do this, follow these steps:

   1. Open the Exchange admin center.
   2. Select Organization.
   3. Under Individual Sharing, double-click the policy that's assigned to the user. This is the policy that was returned in step 1.
   4. On the Sharing Rule page, select Sharing with a specific domain under Specify the domains that you want to share with, and then type Anonymous.
   5. Under Specify what information you want to share, select the calendar sharing level that you want to allow, and then select Save.

More information

For more information, see Enable Internet calendar publishing.

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