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How do I resolve the ACM certificate "validation time out" error?
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I requested an AWS Certificate Manager (ACM) certificate for my domain, but the request failed with a "validation time out" error.
Resolution
If ACM certificate requests aren't validated within 72 hours from the time of the request, then the requests fail with the "validation time out error". To resolve this error, first delete the failed ACM certificate. Then, request a new ACM certificate.