Monday, May 22, 2017

Mailbox Automapping forward and reverse map using Autodiscover and PowerShell

Auto-mapping was a feature that was introduced in Exchange 2010, where when you added Mailbox access permission via Add-MailboxPermission, Outlook would automatically add that Mailbox as an additional Mailbox. Outlook uses Autodiscover to get the information on these mailboxes that are auto mapped via the AlternateMailboxes user setting eg in XML it comes back like the following

One thing you can't see easily via the Exchange Managed Shell cmdlet is which ACE's (Access Control Entries) have Automapping enabled on a particular Mailboxes DACL and which don't. You also can't easily see from one mailbox which mailboxes will be auto mapped to it (basically a reverse mapping).So the purpose of this script is to provide both a forward and reverse mapping of Automapping setting for a collection of Mailboxes that are passed into to. It produces a report that look like

To get this collection you can either use a CSV file of addresses, Get-Mailbox or just a static list.

Eg to run the script using Get-Mailbox

create a blank collection
$Mailboxes = @()

populate the collection
Get-Mailbox -ResultSize Unlimited | foreach-object{$Mailboxes += $_.PrimarySMTPAddress}

then run the script like

 Get-AutoDiscoverMailboxMap -Mailboxes $Mailboxes

The report is outputted in the last line of the script.

I've put a copy of this script on GitHub here

Tuesday, May 09, 2017

Using the Office365/Exchange 2016 REST API to access Mailbox data using PowerShell part 4

This is part 4 of my ongoing series for using the new REST API in Office365 and Exchange 2016. To make the module I created in previous posts a little more easier to use and open it up for other people to contribute to, I've published the module to the PowerShell Gallery and a new GitHub repository for contribution here So to install the latest version of the module from the PowerShell gallery on Windows 10 you just need to use

Install-Module Exch-Rest which will pull the latest version down from the Gallery

then Import-Module Exch-Rest to load the module

(For Windows 8.1 see )

I've changed the authentication functions to allow you to pass in the ClientId, TenantId and RedirectURL to make it easier to use rather then having to use static variables. The documentation still needs a lot of work.

New functions I've added recently


     Gets the user's photo Metadata


     Download the largest UserPhoto

Folder Operations


    Creates a New Mail Folder (you can also create folder of a subclass of IPM.Note)


    Creates a New Calendar Folder


    Creates a New Contacts Folder


   Renames an existing folder


    Updates an existing folder


   Deletes and existing Mailbox Folder


  Set a Personal retention Tag on a Folder this uses the Extended properties simular to this EWS script

Extended property support