Now you will learn how to configure OAuth server-to-server authentication between Lync 2013 and Exchange 2013 and also learn how to configure them both to be partner applications of each other.
This step is a prerequisite when you wish to achieve the following levels of integration:
Lync 2013 to use Exchange 2013 for archiving
Lync 2013 to use the Exchange 2013 unified contact store
Lync 2013 to use high-resolution photos on Exchange 2013
To configure OAuth, we will assign server-to-server authentication certificates on Lync and Exchange to allow them to communicate with each other.
So, what certificates shall we use? For Exchange, we can use the default self-signed Microsoft Exchange Server Auth Certificate that is created when you install your Exchange Server. For Lync, you can use your existing Lync certificate for server-to-server authentication, provided that:
The certificate has the SIP domain on the subject field
The same certificate is...