An Entra authentication flows policy that blocks device code flow for all resources is likely to block SIP Gateway pairing unless the SIP Gateway apps or site are excluded, because SIP Gateway pairing follows the device authorization grant pattern; Microsoft's SIP Gateway pages do not state this directly.
inferred · Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft Teams SIP Gateway
- Subsystem
- conditional-access
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Status
- inferred
- Checked
- 2026-10-02
Sources
- Authentication flows as a condition in Conditional Access policy — Microsoft · tier 2 current vendor documentation · Authentication flows as a condition in Conditional Access policy > Device code flow; Troubleshooting unexpected blocks
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-ca-flow-blocks-pairing. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-ca-flow-blocks-pairing
BibTeX
@misc{warmtransfer-claim-teams-sip-gateway-troubleshooting-ca-flow-blocks-pairing,
title = {Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-ca-flow-blocks-pairing},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-ca-flow-blocks-pairing},
note = {Source note teams-sip-gateway-troubleshooting-ca-flow-blocks-pairing, checked 2026-10-02}
}