Test Connectivity of External Users and External access

Tests for external user access should include each type of external user that your organization supports, including any or all of the following:

• Users from at least one federated domain, and test IM, presence, A/V and desktop sharing.
  
  
• Users of each public IM service provider that your organization supports (and for which provisioning has been completed).
  
  
• Anonymous users.
  
  
• Users within your organization who are logged into Lync remotely, but not using VPN.
  
  

These tests determine whether your Edge Server is:

• Listening on the necessary ports by using a telnet client from outside your network.
  
  
  • Example: telnet ae.contoso.com 443
    
    
  • Perform the preceding test on ports you are using on the Edge Server or Edge Server pool depending on your deployment.
    
    
• Performing accurate external DNS resolution.
  
  
  • From outside your network ping each of the external FQDN’s of your Edge or Edge pool. Even if the ping fails you will see the IP addresses, which you can compare to the ones you have assigned.