Create a single public certificate and assign it to following Edge Server external interfaces using the certificate wizard:

• Access Edge (referred to as SIP Access Edge External in the certificate wizard)
  
  
• Web Conferencing Edge (referred to as Web Conferencing Edge External in the certificate wizard)
  
  
• A/V Authentication Service (referred to as A/V Edge External in the certificate wizard)
  
  

Create a single internal certificate and assign it to following Edge Server internal interfaces:

• Edge Server (referred to as Edge Internal in the certificate wizard)
  
  

For details about certificate requirements, see Changes in Lync Server 2010 that Affect Planning.