Source note · SIP TLS handshake failures on trunks
Microsoft's 12 December 2025 Direct Routing update said that at some future point Microsoft would require all SBC certificates to include the Client Authentication EKU.
disputed · Checked 2026-09-25 · superseded by sip-tls-handshake-failures-dr-client-eku-not-required
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- SBC certificate
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- statement dated 2025-12-12
- Status
- disputed
- Checked
- 2026-09-25
Sources
- What's New Direct Routing — Microsoft · tier 2 current vendor documentation · Update on upcoming certificate changes (December 12, 2025) > Summary, second bullet
Cite this note
APA
WarmTransfer. (2026, September 25). SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-dr-client-eku-future. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-dr-client-eku-future
BibTeX
@misc{warmtransfer-claim-sip-tls-handshake-failures-dr-client-eku-future,
title = {SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-dr-client-eku-future},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-dr-client-eku-future},
note = {Source note sip-tls-handshake-failures-dr-client-eku-future, checked 2026-09-25}
}