Source note · SIP TLS handshake failures on trunks
If mutual TLS is enabled on the SBC for Direct Routing, the SBC needs every required Microsoft Trusted Root certificate installed.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- mutual TLS
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Plan Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · Public trusted certificate for the SBC, final sentence
Cite this note
APA
WarmTransfer. (2026, September 25). SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-dr-mtls-install-roots. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-dr-mtls-install-roots
BibTeX
@misc{warmtransfer-claim-sip-tls-handshake-failures-dr-mtls-install-roots,
title = {SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-dr-mtls-install-roots},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-dr-mtls-install-roots},
note = {Source note sip-tls-handshake-failures-dr-mtls-install-roots, checked 2026-09-25}
}