Office 365 web view has an issue with calendar permissions. One of our calendars has permissions set but does not show any of that information in the GUI. Even after just adding a new user permission it disappears shortly after. Anyone know the reason this is happening? I know the permissions exist because the microsoft tech did log in through powershell showing me the permissions were there but this does not answer why the gui does not show them. Please advise. Microsoft recommended creating a new calendar but with the sheer size of this calendar would be a huge headache to do this.