We have a need to upgrade the Apache and OpenSSL versions of the Xampp package recommended in the web chat SDK for ACCS 7.0. Has anyone done this? What resources are available?

Most significant dependency is PHP5 so updates to Apache and OpenSSL shouldn't be a significant issue. Unfortunately PHP5 is no longer maintained and thus I don't imagine that XAMPP are maintaining those versions any longer. Have a look through their archives and see if the last PHP5 bundle meets your requirements. Upgrading that per their instructions (and test thoroughly).

!NOTE! WebComms Sample Applications ARE NOT production ready; they are sample applications. Take heed of the licensing agreement if you choose to deploy it (i.e. you're on your own).

We could not afford to use php 5.0 since its large vulnerabilities , so I modified our webchat version to work with PHP 7.0 and above work's great.