You cannot, I tried, then checked with HipChat support, who confirmed it isn't an available functionality. So I opened this suggestion ticket:
Please vote for it so it will get more attention from the development team. You may also comment to emphasize your use case.
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Background While our Hipchat server environment was reliable and performing well, as a significant and growing part of our business, the need to leverage the benefits of Hipchat Data Center&nbs...
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