Options for additional accounts not available

I am using Spark version 2.6.3 and as per the screenshots and instructions on the Spark user guide, I should have options to add additional accounts within Spark. My users are logging into an Open Fire server, and I want them to be able to login into a SIP server as well. The Phone client is installed in Spark, but these options do not appear to be visible (attached image of my chat client)