For common area phone enrolment, the admin generates a one-time verification code per MAC address in Teams admin center and the code is dialled on the device after feature code *55* (for example *55*123456); the device must already be onboarded to SIP Gateway.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft Teams SIP Gateway
- Subsystem
- enrolment
- 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 > Provision and enroll SIP devices as common area phones > Note and step 4
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-otp-55-enrolment. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-otp-55-enrolment
BibTeX
@misc{warmtransfer-claim-teams-sip-gateway-troubleshooting-otp-55-enrolment,
title = {Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-otp-55-enrolment},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-otp-55-enrolment},
note = {Source note teams-sip-gateway-troubleshooting-otp-55-enrolment, checked 2026-10-02}
}