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IT Pro: Unattended deployment of Xink Add-in (Microsoft 365)

This article is intended for use by the Microsoft 365 administrators, IT Administrator, and Systems Administrator.

Follow these steps to mass deploy the Xink Outlook add-in to your employees.


  • The add-on only works with Microsoft 365.  It does not work with on-premise Exchange.
  • The user account executing the deployment script mentioned below must-have 'application impersonation' rights. Please refer to this guide on how to grant application impersonation.
  • The Powershell scripts must be executed on PowerShell ISE as an administrator.

Part 1 - Download Xink-in files

Download the PowerShell sctipts from -> and extract the files.
The downloaded zip file 'XinkOutlookAddin' contains a file name "XinkOutlookAddinManifest.xml" and two PowerShell scripts for step 3.

Part 2 - Deployment of the Xink-in

Login to Exchange admin center > Organization > add from file and upload "XinkOutlookAddinManifest.xml"

Edit Xink Addin and select Optional, enabled by default or Mandatory, always enabled and then Save.


Part 3 - Deployment of Xink Domain Token

You need to obtain Xink 'DomainAuthToken' from Xink portal.

Login to Xink portal and copy the Xink Token here ->

Click the icon to the right

Locate the two PowerShell scripts files from the zip-file you downloaded from Step 1.

1.) Start Windows PowerShell ISE as an administrator.
2.) Now open or load the PS script "Load-Exchange-Session.ps1" and run it. You will be prompted to log in to your Microsoft 365 account (enter PIN if MFA/2FA is enabled).

3.) Input code sent by Microsoft if prompted.

4.) It will execute the command for a while to install the required module.

5.) Open or load PS Script "Set-DomainToken.ps1" and run it. It will prompt for the Xink domain token that you copied from

6.) It will again prompt for your Microsoft 365 admin credential and may prompt you to provide permission if this is your first time to execute. Tick 'Consent on behalf of your Organization'

7.) Once credentials are entered and permissions is granted, it will proceed to inject the DomainAuthToken to user mailboxes. This may take a while depending on the number of mailboxes. (see the preview of users)

8.) Notice the last line "Done!", It means 'DomainAuthToken' applied to all Xink Add-in users.

Note: For Outlook on the web, you need to refresh the Internet browser before any changes take effect.

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