As an addition to James answer, we've detailed why we choose the virtualized environment over a stand-alone installer package for HipChat Serve in this FAQ: https://confluence.atlassian.com/display/HC/HipChat+Server+FAQ
HipChat Server Support Engineer | Atlassian
...have mention name FirstnameLastname. Fe.: @MaartenCautreels This certainly helps to know who is being mentioned in a conversation. Imagine your colleague sends the following message...
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