Calender Sharing Permissions

Hello there,

Could you please help me with calendar permissions. I used to be able to access my boss' calendar and add in appointments, change details on appointments (such as change the time or add in information) but for an unknown reason this has changed.

Which calendar permissions do I need, and how do I do this? I need to be able to add in appointments without it emailing him first, full access to appointments and the ability to add in information without having to email notify him first.

How do I do this? I have tried to send him an email request for full details, but it does not grant me that ability. I have also tried to change the settings in calendar permissions to editor but it does not do anything.

Any help would be greatly appreciated!

Many thanks,

Sophie