Share Exchange 2010 Mailbox Calendar with Other Users (PowerShell)

We have a Sandy user, who wants to share her calendar with Patrick. 

On a server, open Exchange Management Shell as administrator. Get the current list of user permissions for Sandy’s mailbox Calendar folder:

[PS]> Get-MailboxFolderPermission -Identity [email protected]:\Calendar

RunspaceId   : 38c2729f-0000-4c13-81bd-173103e349aa
FolderName   : Calendar
User         : Default
AccessRights : {AvailabilityOnly}
Identity     : Default
IsValid      : True

RunspaceId   : 38c2729f-0000-4c13-81bd-173103e349aa
FolderName   : Calendar
User         : Anonymous
AccessRights : {None}
Identity     : Anonymous
IsValid      : True

Assign permissions for Patrick to access Sandy’s Calendar mailbox folder and apply the Reviewer role to his access of that folder (check TechNet’s page for other AccessRights parameters available):

[PS]> Add-MailboxFolderPermission -Identity [email protected]:\Calendar -User [email protected] -AccessRights Reviewer

RunspaceId   : 38c2729f-0000-4c13-81bd-173103e349aa
FolderName   : Calendar
User         : Patrick Star
AccessRights : {Reviewer}
Identity     : Patrick Star
IsValid      : True

Get the current list of user permissions for Sandy’s mailbox Calendar folder again and verify that Patrick is present.

[PS]> Get-MailboxFolderPermission -Identity [email protected]:\Calendar

RunspaceId   : 38c2729f-0000-4c13-81bd-173103e349aa
FolderName   : Calendar
User         : Default
AccessRights : {AvailabilityOnly}
Identity     : Default
IsValid      : True

RunspaceId   : 38c2729f-0000-4c13-81bd-173103e349aa
FolderName   : Calendar
User         : Anonymous
AccessRights : {None}
Identity     : Anonymous
IsValid      : True

RunspaceId   : 38c2729f-0000-4c13-81bd-173103e349aa
FolderName   : Calendar
User         : Patrick Star
AccessRights : {Reviewer}
Identity     : Patrick Star
IsValid      : True

When no longer needed, Patrick’s permission to modify Sandy’s mailbox folder Calendar can be removed by typing:

[PS]> Remove-MailboxFolderPermission -Identity [email protected]:\Calendar -User [email protected]

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