This article will show you how to create Internal Trusted Wildcard Certificate using IIS.
This is very good when configuring internal application like Microsoft Exchange, Lync and others.
To start Open IIS Server
Go to Server Certificates
On the Right Panel Click on Create Domain Certificate
Fill in the details, Make sure you use *. In the Common Certificate name
Select your local CA
To assign the Certificate to a website, Open the site binding and select the certificate.