Step by step info on how to renew DST ROOT CA X3

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Welcome to the Let's Encrypt Community :slightly_smiling_face:

  1. You can't renew DST Root CA X3 because it's a root certificate belonging to a company (in this case IdenTrust).
  2. Let's Encrypt neither owns nor controls IdenTrust in any fashion, so even if it were possible to renew DST Root CA X3, you'd be barking up the wrong tree.
  3. I should flag your post as condescending and offensive. Being uninformed is acceptable and quite natural under many circumstances. Being rude or belligerent as a means of seeking aid is a poor strategy. I get that you're frustrated. Welcome to the club.
  4. As a regular volunteer around here (the Let's Encrypt team is quite small and must carefully focus their resources), I can say that we've been deluged with issues surrounding the DST Root CA X3 expiration for a while now. You're not alone. We're happy to help (free of charge as always) in whatever way we can. We're pretty good at what we do and are almost always successful. We'll be happy to explain what's going on and help you through your particular troubles as best we can.

From your post, I can't deduce what trouble you're facing. Help us out here. What happened?