Source note · Wrong or missing caller ID on outbound calls

For Direct Routing, Teams sends the substitute number and CNAM in the From header, and if the SBC's OnlinePstnGateway has ForwardPai set to true, P-Asserted-Identity carries the real calling user.

Checked 2026-09-25

Vendor: Microsoft
Product: Teams Phone Direct Routing
Subsystem: SIP identity headers
Deployment: multi-tenant
Region: not restricted
Release range: current as of 2026-09-25
Checked: 2026-09-25

Sources

Manage caller ID for users - Microsoft Teams — Microsoft · tier 2 current vendor documentation · Outbound caller ID behavior > Outbound calling line ID (Direct Routing paragraph)

Cite this note

APA

WarmTransfer. (2026, September 25). Wrong or missing caller ID on outbound calls: source note caller-id-presentation-problems-teams-dr-from-and-pai. WarmTransfer. https://warmtransfer.net/knowledge/claims/caller-id-presentation-problems-teams-dr-from-and-pai

BibTeX

@misc{warmtransfer-claim-caller-id-presentation-problems-teams-dr-from-and-pai,
  title  = {Wrong or missing caller ID on outbound calls: source note caller-id-presentation-problems-teams-dr-from-and-pai},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/caller-id-presentation-problems-teams-dr-from-and-pai},
  note   = {Source note caller-id-presentation-problems-teams-dr-from-and-pai, checked 2026-09-25}
}

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