Forum Discussion
Unable to share calendars: There was a problem connecting you to the shared calendar.
I am no longer able to add shared calendars to any users in my organization. I always get the following error message in Outlook 2016 when I try to accept an invitation to a shared calendar :...
Hglasscock Microsoft had closed our ticket and never heard from them since.
We just ran into this error and it was indeed because the disclaimer was in the email. We updated the transport rule and added an exception that if the subject line matches "You're invited to share this calendar" then to not add the disclaimer.
Just searched this and Microsoft has a KB about the disclaimer:
https://docs.microsoft.com/hr-HR/exchange/troubleshoot/outlook-on-the-web-issues/cannot-open-calendar-from-sharing-invitation