Source note · Teams Phone Direct Routing and SBC certification
On an incoming call, Direct Routing finds the tenant by looking up the full Contact-header FQDN as a registered domain, then falls back to the FQDN minus its host portion. If neither matches, the call fails.
Checked 2026-09-23
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- sip-signaling
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-23
- Checked
- 2026-09-23
Sources
- Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · section 'Processing the incoming request: finding the tenant and user', steps 2 and 3
Cite this note
APA
WarmTransfer. (2026, September 23). Teams Phone Direct Routing and SBC certification: source note teams-direct-routing-tenant-lookup. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-direct-routing-tenant-lookup
BibTeX
@misc{warmtransfer-claim-teams-direct-routing-tenant-lookup,
title = {Teams Phone Direct Routing and SBC certification: source note teams-direct-routing-tenant-lookup},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-direct-routing-tenant-lookup},
note = {Source note teams-direct-routing-tenant-lookup, checked 2026-09-23}
}