Update to ExchangeContacts Module to support Modern Auth,Exporting all Contacts to a VCF file (or CSV) ,NON_IPM root folder,hidden contact folders and dumpster exports

I've done some updating of my ExchangeContacts PowerShell module to support the following

1. Modern Authentication in Office365 (distributing the ADAL dll with this module)
2. Compiled and distributed the latest version of the EWS Managed API from GitHub with the module
3. New cmdlet Export-EXCContacts that supports exporting all contacts in a Folder to a single VCF File
4. New cmdlet Export-EXCContacts that supports exporting all contacts to a CSV file (this was already possible with the ExportFolder cmdlet but this is a slightly enhanced format)
5. New cmldet Export-EXCRootContacts lets you export the Non_IPM Subtree folders that contain contacts. (Some of these are created by the Office365 substrate process) for example mycontacts, AllContacts, ContactSearch folders etc. Include dedup code based on Email Address in this cmdlet
6. This is already supported but I wanted to show how you can export the Hidden Contacts Folder likes Recipient Cache, Gal and Organizational Contacts
7. New cmdlet Get-EXCDumpsterContacts get the contacts that are in the RecoverableItems Deletions or Purges Folder
8. New cmdlet Export-EXCDumpsterContacts Exports the contacts that are in the RecoverableItems Deletions or Purges Folder to a single VCF or csv file

Using Modern Authentication

As Basic Authentication in EWS is going away soon in Office365 I've enabled Modern Auth for this module using the ADAL dll which gets distributed via the bin directory in the Module. I didn't enabled it by default because it would cause issues with OnPrem Exchange so to use Modern Auth you just need to use the -ModernAuth switch. You can still pass in the PSCredential object with the -ModernAuth switch and oAuth will still be used vai the username and password grant to allow for silent auth. There is also provision to pass in your own client id for custom app registrations with the -ClientId parameter eg a simple example for using ModernAuth is 

Get-EXCContact -MailboxName gscales@datarumble.com
 -EmailAddress what@what.com -ModernAuth

Export-EXCContacts

Export-EXCContacts supports exporting all the contacts from any folder in a Mailbox to a single VCF file or a CSV File. (EWS provides the VCF nativly for Mailbox contacts so this cmlet hanldes streaming them out to a single file). Eg here are some examples

Exporting to a single VCF

Export-EXCContacts -Folder "\Contacts" -MailboxName gscales@datarumble.com
 -ModernAuth -FileName c:\temp\exp.vcf

or to a CSV

Export-EXCContacts -Folder "\Contacts" -MailboxName gscales@datarumble.com
 -ModernAuth -FileName c:\temp\exp.csv -ExportAsCSV

Export-EXCRootContacts

Export-EXCRootContacts supports exporting contacts from the NON_IPM_Subtree folders in a Mailbox. Typically folders here are created by either a Client like Outlook or OWA, other Office365 substrate process (eg Microsoft Teams) or other third party apps where they want the data to be hidden from the user. Examples of these folders would be Allcontacts, mycontacts etc. I've added this more for educational and diag purposes and Included some dedup code to deduplicate exports based on the EmailAddress. An example of export the AllContacts Folder to a CSV file

Export-EXCRootContacts -MailboxName gscales@datarumble.com -FolderName AllContacts -FileName c:\temp\allContacts.csv
-ExportAsCSV -ModernAuth

Get-EXCDumpsterContacts

This cmdlet will query either the RecoverableItemsDeletions or RecoverableItemsPurges folders in a Mailbox (Dumpster v2 folder) and it will get any contacts that exist in these folders and return them as EWSContact objects. (You can then process them further eg copy,move etc)

eg

Get-EXCDumpsterContacts -MailboxName gscales@datarumble.com -ModernAuth -Purges

or purges

Get-EXCDumpsterContacts -MailboxName gscales@datarumble.com -ModernAuth 

Export-EXCDumpsterContacts

This cmdlet builds on Get-EXCDumpsterContacts and allows you to export what is returned to either a single VCF file or a CSV file. (same logic as Export-EXCContacts)

Export-EXCDumpsterContacts -MailboxName gscales@datarumble.com -ExportAsCSV
 -FileName c:\temp\dumpsterDeletions.csv

or purges

Export-EXCDumpsterContacts -MailboxName gscales@datarumble.com -purges -ExportAsCSV
 -FileName c:\temp\dumpsterPurges.csv

Exporting  hidden Contacts folders

One last thing I wanted to demonstrate with this module is the ability to export the Hidden contact folders in your mailbox, if you have ever peeked at the Contacts folder subfolder hierarchy in a MAPI editor like MFCmapi there are a number of Hidden folders eg

Folders like Recipient Cache, Gal Contacts and Organizational Contacts folder all serve different client specific tasks (that do go wrong sometimes). So you can use this module to export the contacts in these folders to a CSV for any troubleshooting, migration or personal interest needs.

Here are some examples of exporting contacts from those folders to a csv file

Export-EXCContacts -Folder "\Contacts\Organizational Contacts"
-MailboxName gscales@datarumble.com -ModernAuth -FileName c:\temp\exp.csv 
-ExportAsCSV

The new module can be found on the Powershell Gallery https://www.powershellgallery.com/packages/ExchangeContacts/1.6.0.0 and the source is available here on GitHub https://github.com/gscales/Powershell-Scripts/tree/master/EWSContacts/Module