For 511404, Microsoft advises making the callee number format from the SBC or PSTN trunk provider match the format assigned to the user or resource account, usually E.164 including country code.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- Response codes
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- SIP 404 and Microsoft response codes - Microsoft Teams — Microsoft · tier 2 current vendor documentation · Section '511404 404 Getting user info by number from RuntimeAPI failed', suggested actions
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting SIP 404 Not Found and 484 Address Incomplete call failures: source note sip-404-484-troubleshooting-teams-511404-format. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-404-484-troubleshooting-teams-511404-format
BibTeX
@misc{warmtransfer-claim-sip-404-484-troubleshooting-teams-511404-format,
title = {Troubleshooting SIP 404 Not Found and 484 Address Incomplete call failures: source note sip-404-484-troubleshooting-teams-511404-format},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-404-484-troubleshooting-teams-511404-format},
note = {Source note sip-404-484-troubleshooting-teams-511404-format, checked 2026-10-02}
}