Affects Version/s: 7.2.X, 7.3.X, Master
Steps to Reproduce
1. Configure Control Panel > Server Administration > Mail to allow for emails to be sent
2. Create a new user with a valid email address
3. Add the new user to the default site
4. Add a Calendar widget to the site
5. Create a new Calendar event and invite the new user
There is an .ics attachment in the email notification.
There is no .ics attachmetn in the email notification.