Public CA certificate changes impacting Dedicated Instance

Publisher

Cisco

URL

https://help.webex.com/en-us/article/zo55dl/Public-CA-certificate-changes-impacting-Dedicated-Instance

Published

2026-06-05

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco website terms of use; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• Cisco gives 1 February 2027 as the date from which Google Chrome policy prohibits public roots from issuing certificates that combine Server and Client Authentication EKUs, with enforcement from 15 March 2027. disputed in context
• Cisco says third-party systems that make TLS or mTLS connections to Dedicated Instance UC applications, such as SIP trunks to Unity Connection or Unified CM, must have IdenTrust Public Sector Root CA 1 in their trust store or those connections will fail. in context
• From 1 June 2026, renewed certificates for Webex Calling Dedicated Instance UC applications are signed under IdenTrust Public Sector Root CA 1 instead of IdenTrust Commercial Root CA 1. in context

Cite this source record

APA

WarmTransfer. (2026, June 5). Public CA certificate changes impacting Dedicated Instance. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-help-zo55dl-public-ca-changes-di

BibTeX

@misc{warmtransfer-cisco-help-zo55dl-public-ca-changes-di,
  title  = {Public CA certificate changes impacting Dedicated Instance},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-help-zo55dl-public-ca-changes-di},
  note   = {Cisco, accessed 2026-09-25}
}