SOLVED: This recipient’s organization is not set up for secure sharing. Issues sharing a calendar in Outlook.

The Error

So today I was fighting an issue where a user was trying to share a specific calendar with another user in the department.  The issue appeared when the calendar owner was trying to send the shared calendar invite via email to the other user.  When the calendar owner would try to send the email, a message would appear. It stated this recipient’s organization is not set up for secure sharing. Issues sharing a calendar in Outlook.

Calendar sharing is not available with the following entries because of permission settings on your network:

 

admin@example.com> -Problem: The recipient’s organization is not set up for secure sharing.

The error message looked like this:

This recipient's organization is not set up for secure sharing. Issues sharing a calendar in Outlook.

 

The Fix

First you need to work from the calendar owners computer. After having her run through how she was trying to send the invite, we noticed that she was using the cached autocomplete address from outlook to send the invite. That is when the error is introduced.

Thus we instead directed her to use the address from the GAL (Global Address List).

How To Use The GAL Address

This can be done by clicking on the To: button, searching for the person that you want to share the calendar with, and then select that user from the address book.

If the user you are trying to add has been newly created, then you may have to either wait until the next day (which is more likely) or ask your email administrator to force the Address Book to rebuild.

By default, Exchange email servers usually rebuild the address book every morning at 2 AM and most email administrators are not going to force a rebuild during business hours.

Once we used this method, the invitation email sent properly and the other user who was having issues was able to access the calendar with any errors!

If you found this helpful and can now access the calendar, please take a second to vote below on its helpfulness or leave a comment and let us know if this worked for you!

Outlook-Error-Recipients-Organization-Not-Setup-Secure-Sharing