Installation of Exchange 2016-Enabling Instant Messaging on Outlook Web App

Equipped with Skype for Business Server correctly setup and configured, you may then start to configure Outlook Web App. The primary step in that process is to enable instant messaging present on all your Outlook Web App virtual directories on your front-end servers. (There is no requirement to enable instant messaging for the virtual directories on your backend servers. It is recommended that you do not enable instant messaging on your backend servers.) Login to your Exchange Server and begin Exchange PowerShell, and then execute the following command:


Get-OwaVirtualDirectory | Set-OwaVirtualDirectory -InstantMessagingEnabled $True –

InstantMessagingType OCS


In case it is successful, you must see this (ignore making a new session message, as I had Exchange PowerShell open to long)


Exchange Server

Now we require confirmation in case we have any certificate assigned for UM service. In Exchange PowerShell execute the following command:


Get-ExchangeCertificate | select services



Exchange Certificate


As you might observe, we do not have any Certificate allocated to UM service. Login to ECP ( ) and navigate surfing to Servers – and Edit your Exchange server:


Exchange Admin Center


Navigate to surf over the Unified Messaging and alter UM Call Router settings and UM Service settings to TLS mode. Select “Yes” to confirm


Exchange Call router

Click on Certificate present on the top menu and edit your choosen certificate


Exchange Admin Certificate

Now, Click  on ervices and  then check for both UM services and yes to confirm.


Exchange 2016

Over  your Exchange server, open services and restart both UM services.


Exchange Server local

In Exchange PowerShell execute the following command to get thumbprint of your UM certificate:

Get-ExchangeCertificate | select services,thumbprint


Exchange Service thumbprint


Make a note of the Thumbprint which has been assigned UM services.


Kristin is a content strategist at Techarex Networks. Kristin follows the B2B technology space closely and loves to write on the latest changes in technology, futuretech and fixes for day to day how to issues. Besides writing Kristin also loves music, moves and skating.

Techarex Networks provides the complete range of Hosted Exchange solutions and services, giving access to reliable, secure, messaging and collaborative enterprise-grade solutions having 99.999% uptime with unmatched SLA. Provide enterprise-level sync with Outlook Web App and mobile devices. Anywhere, anytime access using Instant Message and video calling integration.