This change has been rescheduled to Tuesday February 8th 14:00 UTC to give customers more time to adjust their environments.

A knowledge base article with a full description of the change is available here. The article contains important information on mandatory changes for users on 10.0 or 10.1 client versions in North America.

This change introduces a new endpoint for validating the certificate status. Please ensure that operating systems hosting the client are able to validate the server certificate status (OCSP/CRL) using port 80. 

Ensure that these certificate revocation lists (CRLs) are accessible from the client machine prior to the planned change on Tuesday February 8th 14:00 UTC  to guarantee continuity of service.

Current CRL: http://crl.godaddy.com/gdig2s1-3235.crl
New CRL: http://crl.sectigo.com/SectigoRSAOrganizationValidationSecureServerCA.crl
Platform CRL: http://crl3.digicert.com/ssca-sha2-g7.crl