With ForwardCallHistory turned on (default False), the Microsoft 365 proxy sends History-Info and Referred-By headers through the trunk.
Checked 2026-09-24
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- SBC settings
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Connect your Session Border Controller (SBC) to Direct Routing — Microsoft · tier 2 current vendor documentation · SBC settings table, ForwardCallHistory row
Cite this note
APA
WarmTransfer. (2026, September 24). Building a hybrid Unified CM and Teams Phone environment for a phased migration: source note cucm-teams-hybrid-build-sbc-forward-history. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-teams-hybrid-build-sbc-forward-history
BibTeX
@misc{warmtransfer-claim-cucm-teams-hybrid-build-sbc-forward-history,
title = {Building a hybrid Unified CM and Teams Phone environment for a phased migration: source note cucm-teams-hybrid-build-sbc-forward-history},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-teams-hybrid-build-sbc-forward-history},
note = {Source note cucm-teams-hybrid-build-sbc-forward-history, checked 2026-09-24}
}