Using a web browser that is outside of the external firewall, go to the following URLs:

• For Address Book Server, type a URL similar to the following: https:// externalwebfarmFQDN /abs/extwhere externalwebfarmFQDNis the external FQDN of the Web farm that hosts Address Book server files. The user should receive an HTTP challenge, because directory security on the Address Book Server folder is configured to Microsoft Windows authentication by default.
  
  
• For Web conferencing, type a URL similar to the following: https:// externalwebfarmFQDN /conf/ext/Tshoot.htmlwhere externalwebfarmFQDNis the external FQDN of the Web farm that hosts meeting content. This URL should display the troubleshooting page for Web conferencing.
  
  
• For distribution group expansion, type a URL similar to the following: https:// ExternalwebfarmFQDN /GroupExpansion/ext/service.asmx. The user should receive an HTTP challenge, because directory security on the distribution group expansion service is configured to Microsoft Windows authentication by default.