Add Calendar Permissions in Office 365 via Powershell using Add-MailboxFolderPermission

Step by Step Guide for setting calendar permissions in Office 365:

First step would be launch Powershell as Administrator.

Second would be to open a new PS Session on powershell to Exchange Online/Office 365 using below commands.

$GetCred = Get-Credential


$PSSession = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell/ -Credential $GetCred -Authentication Basic -AllowRedirection


Import-PSSession $PSSession


Now the last step is to configure the permissions for the user2 permissions on user1 calendar using below Powershell:

Add-MailboxFolderPermission -Identity user1@domain.com:\calendar -user user2@domain.com -AccessRights Editor

These are the available permissions levels for above -AccessRights are given below

1. None: FolderVisible
2. Owner: CreateItems, ReadItems, CreateSubfolders, FolderOwner, FolderContact, FolderVisible, EditOwnedItems, EditAllItems, DeleteOwnedItems, DeleteAllItems
3. PublishingEditor: CreateItems, ReadItems, CreateSubfolders, FolderVisible, EditOwnedItems, EditAllItems, DeleteOwnedItems, DeleteAllItems
4. Editor: CreateItems, ReadItems, FolderVisible, EditOwnedItems, EditAllItems, DeleteOwnedItems, DeleteAllItems
5. PublishingAuthor: CreateItems, ReadItems, CreateSubfolders, FolderVisible, EditOwnedItems, DeleteOwnedItems
6. Author: CreateItems, ReadItems, FolderVisible, EditOwnedItems, DeleteOwnedItems
7. NonEditingAuthor: CreateItems, ReadItems, FolderVisible
8. Reviewer: ReadItems, FolderVisible
9. Contributor: CreateItems, FolderVisible

To check existing permissions, use below command

Get-MailboxFolderPermission -Identity user1@domain.com:\calendar

FolderName         User                   AccessRights
———-         —-          ————
Calendar             Default                {AvailabilityOnly}
Calendar             Anonymous         {None}
Calendar             user2                   {AvailabilityOnly}
Calendar             user4                   {LimitedDetails}

If Existing permission already exists then use below command to change the permissions as needed.

Set-MailboxFolderPermission -Identity user1@domain.com:\calendar -user user2@domain.com -AccessRights Editor

To Check permissions again:

Get-MailboxFolderPermission -Identity user1@domain.com:\calendar

FolderName         User                   AccessRights
———-                   —-          ————
Calendar             Default                {AvailabilityOnly}
Calendar             Anonymous         {None}
Calendar             user2                  {Reviewer}
Calendar             user4                  {LimitedDetails}