Source note · SIP TLS handshake failures on trunks
Certificates from Microsoft's new CA for the Teams Direct Routing SIP endpoints went into production at the end of July 2026, and the pre-change testing endpoint was discontinued.
Checked 2026-09-25
The certificates issued by a new CA were rolled out in production at the end of July 2026.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- certificate lifecycle
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- end of July 2026 onward
- Checked
- 2026-09-25
Sources
- What's New Direct Routing — Microsoft · tier 2 current vendor documentation · Testing endpoint for upcoming certificate changes (February 16, 2026), Warning box
Cite this note
APA
WarmTransfer. (2026, September 25). SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-dr-new-ca-in-production. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-dr-new-ca-in-production
BibTeX
@misc{warmtransfer-claim-sip-tls-handshake-failures-dr-new-ca-in-production,
title = {SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-dr-new-ca-in-production},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-dr-new-ca-in-production},
note = {Source note sip-tls-handshake-failures-dr-new-ca-in-production, checked 2026-09-25}
}