How To Share Office 365 Calendar

Office 365 Calendar Sharing

As an Exchange Online admin, users may ask you to delegate access to their calendar.

Unfortunately, you can’t do this via the Exchange Admin Center. It’s one of many tasks that require PowerShell.

With Easy365Manager, the leading Office 365 management snap-in for Active Directory, you can share Office 365 calendars easily from AD user properties:

If you prefer to spend your time running PowerShell scripts, the following guide will show exactly how you do it.

1. Connect to Exchange Online using PowerShell

Use an Exchange Online Remote Session (no module installation required) or use the EXO V2 module (supports MFA).

This sample code shows how to use the Exchange Online v2 module:

Connect-ExchangeOnline

For complete details on connecting to Exchange Online with PowerShell, read Connect to Office 365 – PowerShell.

2. Check Existing Calendar Permissions

Before configuring calendar sharing on a mailbox, you should check the existing permissions.

Use the following command to list the calendar permissions (substitute username with actual user name):

Get-MailboxFolderPermission username:\calendar

Sample output from this command may look like this:

PS C:\WINDOWS\system32> Get-MailboxFolderPermission tycho.brahe:\calendar
FolderName           User                 AccessRights              SharingPermissionFlags
----------           ----                 ------------              ----------------------
Calendar             Default              {AvailabilityOnly}
Calendar             Anonymous            {None}

The reason you should check existing settings is that you need to use different commands depending on whether you’re updating existing permissions or setting new permissions.

3. Configure Mailbox Sharing

If the user or group to which you are delegating rights already has rights on the calendar you must use the Set-MailboxFolderPermission command.

If e.g. you want to change the rights assigned to Default from AvailabilityOnly to LimitedDetails use the following command:

Set-MailboxFolderPermission tycho.brahe:\calendar -User Default -AccessRights LimitedDetails

On the other hand, if you’re assigning new permissions on the calendar, you must use the Add-MailboxFolderPermission command.

If . e.g., you want to grant the user Hans.Schjellerup the Editor right on the calendar of user Tycho Brahe, use the following command:

Add-MailboxFolderPermission tycho.brahe:\calendar -User Hans.Schjellerup -AccessRights Editor

After running the two above commands on the calendar of user Tycho Brahe the configuration should now look something like this:

PS C:\WINDOWS\system32> Get-MailboxFolderPermission tycho.brahe:\calendar
FolderName           User                 AccessRights              SharingPermissionFlags
----------           ----                 ------------              ----------------------
Calendar             Default              {LimitedDetails}
Calendar             Anonymous            {None}
Calendar             Hans Schjellerup     {Editor}

If you want to know more about the mailbox folder and calendar access rights available, please refer to this article: Add-MailboxFolderPermission.

Consolidate Active Directory and Office 365 Administration

With Easy365Manager, your Office 365 user provisioning, license, and mailbox administration all become an integrated part of AD user management.

This unique approach can save you a ton of time. You can create synchronized Office 365 users and shared mailboxes in just a few seconds.

Similarly, you can retire user accounts, convert to shared mailboxes and set up forwarding in a matter of seconds.

The mixed bag of standard Microsoft tools requires that you switch between AD, Exchange on-premises, Microsoft 365 Admin Center, Exchange Online Admin Center and Azure AD Connect.

This leads to tedious workflows and frequent errors that accidentally may cause dual Office 365 users and mailboxes to be generated.

Easy365Manager removes the pain and lets you and your team work much faster.

Download the fully functional 30-day trial here.