Tuesday, October 17, 2017

Export Contacts from a Mailbox Contacts Folder or Public Folder to a CSV file using EWS and REST

As I had a few questions about exporting contacts to CSV from both Mailbox and Public folders I've added some new functions to the my EWS contacts module to make this easier.  I've added to new cmdlets the first is


This will export a contacts folder to CSV's either the default Contacts Folder in a Mailbox or a secondary Contacts folder if you enter in the FolderPath eg to export the Default contacts Folder use

Export-ContactsFolderToCSV - MailboxName user@domain.com -FileName c:\exports\contacts.csv

To export a Secondary Contacts Folder use

Export-ContactsFolderToCSV - MailboxName user@domain.com -FileName c:\exports\contacts.csv -Folder \Contacts\SecondContactsFolder


This will export a Public Contacts Folder to a CSV file to use this use

Export-PublicFolderContactsFolderToCSV -MailboxName mailbox@domain.com -FileName c:\exports\PublicFolderexport.csv -PublicFolderPath \folder\folder2\contacts

The EWS Contacts Module is available on GitHub here https://github.com/gscales/Powershell-Scripts/blob/master/EWSContacts/EWSContactFunctions.ps1

I've also added some code to my Exch-REST module to allow export of a Contacts Folder using the new REST API on Office365 and Exchange 2016. To use this you need version 2.4 of the module from the PowershellGallery https://www.powershellgallery.com/packages/Exch-Rest then use

Export-ContactFolderToCSV -MailboxName tmpcontact@domain.com -AccessToken $AccessToken -FileName c:\exports\filename.csv

Wednesday, October 04, 2017

Showing all your Room Mailboxes in Office365 using the Graph REST API

One of the recurring questions you see asked in Forums around EWS is the ability to see all the Room Mailboxes in Exchange. This is pretty reasonable request that hasn't really had an easy answer in the past there are RoomLists but these required setup and ongoing maintenance and coordination  which can be troublesome. If you where using OnPrem exchange then instead of using EWS you could just use LDAP to lookup Active Directory directly (as well all know AD is the directory service for Exchange) eg back in 2007 I created this http://gsexdev.blogspot.com.au/2007/04/webservice-to-find-room-and-equipment.html.

With Office365 you don't have LDAP access to the directory and the Graph API while its good doesn't offer access to the particular property on a User or Directory Object that would allow you to tell if that object has an associated Room (or group or shared mailbox). The good news however is the Graph API  now gives you the ability to pull all the Room Mailbox using findrooms operation https://developer.microsoft.com/en-us/graph/docs/api-reference/beta/api/user_findrooms

I've added support for this to my Exch-Rest Module in the Powershell gallery https://www.powershellgallery.com/packages/Exch-Rest  so you can now get this with a script like the following using the Beta namespace

$Token = Get-AccessToken -MailboxName mailbox@domain.com -ClientId 5471030d-f311-4c5d-91ef-74ca885463a7 -redirectUrl urn:ietf:wg:oauth:2.0:oob -ResourceURL graph.microsoft.com -beta  
Find-Rooms -Mailbox mailbox@domain.com -AccessToken $Token 
and it returns a simple list of your Room mailboxes like

You could also pipe the results into another script to find the usages of those room mailboxes for the next day. To do this I use the Get-CalendarView cmdlet which makes a request for the next 24 hours of appointments using a CalendarView as documented in https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/api/user_list_calendarview (for this to work you need to have rights on all the Rooms you want to report on else you will get a 'Service Unavailable' error)

$MailboxName = "gscales@datarumble.com"
$Token = Get-AccessToken -MailboxName $MailboxName  -ClientId 5471030d-f311-4c5d-91ef-74ca885463a7 -redirectUrl urn:ietf:wg:oauth:2.0:oob -ResourceURL graph.microsoft.com -beta  
$rptCollection = @()
Find-Rooms -Mailbox $MailboxName  -AccessToken $Token | foreach-object{
        $RoomAddress =  $_.address
        Get-CalendarView -MailboxName $_.address -StartTime (Get-Date) -EndTime (Get-Date).AddDays(1) -AccessToken $Token  | foreach-object{
                $rptObj = "" | Select Room,Organizer,Subject,Start,End
                $rptObj.Room = $RoomAddress 
$rptObj.Organizer = $_.organizer.emailAddress.name
                $rptObj.Subject = $_.subject
                $rptObj.Start = [DateTime]::Parse($_.start.datetime).ToString("yyyy-MM-ddTHH:mm:ss")
                $rptObj.End =  [DateTime]::Parse($_.end.datetime).ToString("yyyy-MM-ddTHH:mm:ss")
                $rptCollection += $rptObj
You can then turn the collection into a CSV or HTML file as you like

This full sample with HTML output and the module source code can be found on GitHub here https://github.com/gscales/Exch-Rest (sample is in samples)