Microsoft states that setting ForwardPai to True renders the From header anonymous, citing RFC 5379 and RFC 3325.
Checked 2026-10-02
Setting this parameter to $true will render the from header anonymous, in accordance of RFC5379 and RFC3325.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- Set-CsOnlinePSTNGateway
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Set-CsOnlinePSTNGateway (MicrosoftTeams) — Microsoft · tier 2 current vendor documentation · Parameters > -ForwardPai
Cite this note
APA
WarmTransfer. (2026, October 2). SIP identity headers: P-Asserted-Identity and Diversion and History-Info: source note sip-identity-headers-teams-forwardpai-anon-from. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-identity-headers-teams-forwardpai-anon-from
BibTeX
@misc{warmtransfer-claim-sip-identity-headers-teams-forwardpai-anon-from,
title = {SIP identity headers: P-Asserted-Identity and Diversion and History-Info: source note sip-identity-headers-teams-forwardpai-anon-from},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-identity-headers-teams-forwardpai-anon-from},
note = {Source note sip-identity-headers-teams-forwardpai-anon-from, checked 2026-10-02}
}