- Plesk for Windows
Unable to issue an SSL certificate using Let's Encrypt for a specific domain in Plesk for Windows at Domains > example.com > SSL/TLS Certificates:
PLESK_ERROR: The authorization token is not available at http://example.com/.well-known/acme-challenge/347mK_j_YTyKfxB_tYSdcmzvlze0N5OJKcluSRxc9yY
- The authorization token URL mentioned in the error can not be accessed via web browser failing with a 403 error.
Require SSL/TLS option is enabled at Domains >example.com > IIS Settings so challenge directory is being accessed via HTTPS protocol due to redirects. The HTTP-01 challenge required by Let's Encrypt can only be done on port 80.
Disable Require SSL/TLS option at Domains > example.com > IIS Settings > Directory Security Settings and apply the changes.
- Re-issue the certificate at Domains > example.com > SSL/TLS certificates
- Re-enable Require SSL/TLS option at Domains > example.com > IIS Settings > Directory Security Settings if required.