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https://community.letsencrypt.org/t/questions-about-renewing-before-tls-alpn-01-revocations/170449

Questions about Renewing before TLS-ALPN-01 Revocations 

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UPDATE 29 January 2022:

We completed the revocation of approximately 2.7 million certificates validated with the TLS-ALPN-01 method.
If a subscriber did not renew and replace their certificate before revocation, 
clients may see warnings and errors. 
Affected subscribers should continue to renew and their replace certs if they have not done so yet.
}}}

https://letsencrypt.status.io/pages/incident/55957a99e800baa4470002da/61f4e03d07404e053a7ecfd5


== history ==
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Affected TLS-ALPN-01 Certificate Revocation CompleteOperational

Components acme-v02.api.letsencrypt.org (Production)

Locations  High Assurance Datacenter 1, High Assurance Datacenter 2

January 29, 2022 06:35 UTC

[Monitoring] We revoked aprox. 2.7 million certificates validated with the TLS-ALPN-01 method 
because of a compliance problem. 
If a subscriber did not renew and replace their certificate before revocation,
clients may see warnings and errors.
Read about this incident and get help to replace your certificate on the community forum 
community.letsencrypt.org/t/2022-01-25-issue-with-tls-alpn-01-validation-method/170450
}}}
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