Scheduling and managing events using Outlook.com calendar
Same here. Shared from one MSN.COM email to two other MSN.COM users, and all see the code 500 error. Also, calendars shared directly don't work either. This was working fine for us two weeks ago, but stopped, with no error messages. I assume the code 500, which refers to a server error, may be related?
Doing further testing, my problem is only related to sharing from MSN.COM email addresses. It works fine when using an outlook.com email address. I did a chat session with tech support and submitted my findings...