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A repository of PowerShell Scripts to automate a variety of IT related maintenance tasks.

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Update-CalendarPermissions.ps1

Description

@GitHub Copilot - Welcome @BanterBoy, I’m your Copilot and I’m here to help you get things done faster. I can identify issues, explain and even improve code.

You can ask generic questions, but what I’m really good at is helping you with your code. For example:

Generate unit tests for my code Explain the selected code Propose a fix for the bugs in my code If you want to learn more about my capabilities and limitations, check out the Copilot documentation.

I’m powered by AI, so surprises and mistakes are possible. Make sure to verify any generated code or suggestions, and share feedback so that we can learn and improve.

@BanterBoy: - Explain what the script does and why it is useful.

@GitHub Copilot -

Script

function Update-CalendarPermission {

	<#
	Update-CalendarPermission -Identify <mailbox> -User <xxx> -Permission <permission>
	#>

	param
	(
		[Parameter(Mandatory = $true,
			HelpMessage = "Enter a mailbox where you apply permission to")]
		[ValidateNotNullOrEmpty()]
		[string]$Identity,

		[Parameter(Mandatory = $true, HelpMessage = "Enter a user/group who will be granted the permission  syntax domain\xxx might be needed")]
		[ValidateNotNullOrEmpty()]
		[string]$User,

		[parameter(Mandatory = $true, HelpMessage = "Enter a valid permission set")]
		[ValidateSet("ReadItems", "CreateItems", "EditOwnedItems", "DeleteOwnedItems", "EditAllItems", "DeleteAllItems", "CreateSubfolders", "FolderOwner", "FolderContact", "FolderVisible", "None", "Owner", "PublishingEditor", "Editor", "PublishingAuthor", "Author", "NonEditingAuthor", "Reviewer", "Contributor", "AvailabilityOnly", "LimitedDetails", "Remove")]
		[string]$Permission
	)

	#Add Exchange 2010 Management Shell if needed
	if (! (Get-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010 -ErrorAction:SilentlyContinue)) {
		Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010 -ErrorAction:Stop
	}

	$MBX = Get-Mailbox $identity

	$CalendarName = (Get-MailboxFolderStatistics -Identity $MBX.alias -FolderScope Calendar | Select-Object -First 1).Name
	$folderID = $MBX.alias + ':\' + $CalendarName

	if ($Permission -eq 'remove') {
		# special case, remove permission from user
		Remove-MailboxFolderPermission -Identity $folderID -User $User -Confirm:$False
	}
	else {
		$i = @(Get-MailboxFolderPermission -Identity $folderID -User $User -ErrorAction SilentlyContinue).count
		if ($i -eq 0) {
			# not in ACL, add permission
			Add-MailboxFolderPermission -Identity $folderID -User $User -AccessRights $Permission > $Null
		}
		else {
			# user is already in ACL, change permission
			Set-MailboxFolderPermission -Identity $folderID -User $User -AccessRights $Permission
		}

		# display new permission for $user
		Get-MailboxFolderPermission -Identity $folderID -User $User
	}
}

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