SIP phones on SIP Gateway depend on Call Redirect, so the admin must set AllowCallRedirect to Enabled in the user's Teams calling policy; local call forwarding on the device also needs it.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft Teams SIP Gateway
- Subsystem
- calling-policy
- 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 > Sync policy changes to SIP devices to enforce policies
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-callredirect-required. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-callredirect-required
BibTeX
@misc{warmtransfer-claim-teams-sip-gateway-troubleshooting-callredirect-required,
title = {Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-callredirect-required},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-callredirect-required},
note = {Source note teams-sip-gateway-troubleshooting-callredirect-required, checked 2026-10-02}
}