Teams users must have a phone number with PSTN calling enabled to use SIP Gateway; Microsoft lists a missing number as a cause when a device does not update after successful sign-in.
Checked 2026-10-02
Teams users must have a phone number with PSTN calling enabled to use SIP Gateway.
- Vendor
- Microsoft
- Product
- Microsoft Teams SIP Gateway
- Subsystem
- licensing
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Plan SIP Gateway — Microsoft · tier 2 current vendor documentation · Plan SIP Gateway > Requirements to use SIP Gateway
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-pstn-number-required. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-pstn-number-required
BibTeX
@misc{warmtransfer-claim-teams-sip-gateway-troubleshooting-pstn-number-required,
title = {Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-pstn-number-required},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-pstn-number-required},
note = {Source note teams-sip-gateway-troubleshooting-pstn-number-required, checked 2026-10-02}
}