On each web server where you want to install the WebAccess Application, follow the instructions in Setting Up GroupWise WebAccess
in the GroupWise 2014 R2 Installation Guide.
When you have multiple WebAccess Applications for your GroupWise system, its recommended to have a Layer 4 Switch in front of the two or more WebAccess Application web servers. Select a friendly hostname such as gwmail.yourcompanyname.com that users can type in their web browsers. Set up a DNS redirection so that gwmail.yourcompanyname.com automatically redirects to https://gwmail.yourcompanyname.com/gw/webacc, and when the WebAccess Application on that main web server communicates with a POA, it then redirects the WebAccess user to the proper post office and POA for mailbox access.