In-scope SIP phones are not OAuth-capable, so SIP Gateway authenticates the user through a web authentication app and pairs the device with the user's credentials, and Microsoft points to the OAuth 2.0 device authorization grant flow for background.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft Teams SIP Gateway
- Subsystem
- authentication
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Configure SIP Gateway — Microsoft · tier 2 current vendor documentation · Configure SIP Gateway > How to sign in and sign out > User pairing and sign-in > first Note
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-device-code-pairing. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-device-code-pairing
BibTeX
@misc{warmtransfer-claim-teams-sip-gateway-troubleshooting-device-code-pairing,
title = {Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-device-code-pairing},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-device-code-pairing},
note = {Source note teams-sip-gateway-troubleshooting-device-code-pairing, checked 2026-10-02}
}