Available access roles:
Owner - read, create, modify and delete all items and folders.
PublishingEditor - read, create, modify and delete items/subfolders.
Editor - read, create, modify and delete items.
PublishingAuthor - read, create all items/subfolders. modify and delete only items you create.
Author - create and read items; edit and delete own items
NonEditingAuthor - full read access and create items. You can delete only your own items.
Reviewer - read-only.
Contributor - create items and folders.
AvailabilityOnly - View only availability data.
LimitedDetails - View availability data with subject and location.
None - no permissions to access folder and files.
Change Default permissions:
Set-MailboxFolderPermission -Identity User1:\Agenda -User Default -AccessRights PublishingEditor
Add permissions:
Add-MailboxFolderPermission -Identity User1:\Agenda -user User2 -AccessRights PublishingEditor Add-MailboxFolderPermission -identity "User1:\Agenda" -user "Universal Security Group" -AccessRights Reviewer
View current permissions:
Get-MailboxFolderPermission User1:\Agenda | select User, AccessRights
View Delegate:
Get-CalendarProcessing username | select ResourceDelegates
Remove Delegate:
Set-CalendarProcessing username -ResourceDelegates $null
Reset Delegate User Collection:
Remove-MailboxFolderPermission -Identity "User1:\Calendar" -ResetDelegateUserCollection
Disconnect:
Remove-PSSession $Session