HipChat search doesn't currently support regex-style searching. There are some shortcuts you can use to improve the accuracy of your search, such as using "@mention" which will filter messages to those sent by that particular user (in addition to messages with that specific mention).
We hope to add improved search options over time, but it's not clear whether that would include regex-based searches.
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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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