I've seen a couple previous posts on this, but can't find an official answer anywhere. Once a DNS challenge is successful is there a period of time where that response is cached for subsequent challenges, or will a new response be necessary every time?
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Hi @derak!
Once successfully completed, an authorization is cached for 30 days as long as subsequent requests use the same ACME account key.
This is officially documented here:
Note that the limit may get shorter in the future, e.g. 7 days.
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