Hi @act_waltersj, for my experience, if you haven't metrics on UFs, the UFs 6.x continues to work with Idx 8.x and HFs 8.x. Splunk doesn'r support this but it should work. So I think that you can upgrade idx to 8.x, then HFs to 8.x and then UFs to 8.x, so you don't need to upgrade twice. Ciao. Giuseppe.
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