When sharing a mail folder or your calendar, you can choose what level of access to grant. Here's a list of the permission levels available in Outlook 2016 for Mac, listed from least access to most access.
Most people only need to set permission levels for their calendar, so certain other people can see the details of their calendar, not just their free/busy times. 'Reviewer' is the permission level you'll most likely want to use for that purpose.
The simplest way to check and/or modify a file or folder’s permissions on Mac OS X is through the Get Info window. Simply select the file or folder in question and choose the Get Info command from the File menu or right-click on the file or folder and choose Get Info from the pop-up menu that appears.
On your Mac, choose a file or folder. Right-click it and select Get info. Click the disclosure triangle in the Sharing & Permissions block. Click the lock icon to unlock it. Change permissions for files, folders, or disks on Mac. Permission settings determine who can view and alter files on the computer. You change permission settings at the bottom of the Info window for a file, folder, or disk in the Finder. Managing @northwestern.edu (Office 365) folder permissions in Outlook 2016 for macOS If you don't want to give someone total access to your account, you can give them permission to access one or more folders in your @northwestern.edu mailbox.
Network Directory Permissions
Directory Permission 0216 For Mac Download
|Permission level||What it means to the person being given access|
|None||The person has no access.|
|Free/Busy Only||For mail, person has no access. For calendar, meeting proposer can see your free/busy times in the Scheduling Assistant or the Scheduling tab. This is the default setting for Office 365 accounts at Cornell.|
|Free/Busy,Time, Subject, and Location||For mail, person has no access. For calendar, meeting proposer can see your free/busy times, including details (but not the text of the meeting notes), in the Scheduling Assistant or the Scheduling tab.|
|Contributor||Person can create new items but cannot see any of the contents of the folder. (The folder's owner will be able to see them.)|
|Reviewer||Person can read items in the folder, but cannot create, edit, or delete items.|
|Non-editing Author||Person can create and read items, but not edit them. Person can delete items they've created, but cannot delete items created by the owner or other people.|
|Author||Person can create and read items. Person can edit and delete items they've created, but not items created by the owner or other people.|
|Publishing Author||Same as Author, plus person can create new sub-folders.|
|Editor||Person can create, read, edit, and delete all items, regardless of who created them.|
|Publishing Editor||Same as Editor, plus person can create new sub-folders.|
|Owner||Person has supreme executive power over your folder, as if it was their own.|