Cannot Share your own calendar Office 365
If you encounter that you do not have permission to share your own Calendar.
When I done this for Neuromod Medical
It turned out that the user had shared her own calendar to herself with view only permissions on
a local Outlook on their PC and then giving them the error message that you do not have permission
to share this calendar.
To fix this is very simple, Check the shared calendars section in Outlook (Local Outlook)
if you see the users calendar in their as well as my calendar (Best off making a copy of the calendar first just incase)
Then remove the one under shared calendars
You should then be able to share it out with what ever user needed either on local Outlook or the Online version
Ryan G