In Unified CM, Error 207 Device Name Empty indicates the Extension Mobility service URL is wrong (for example the device=#DEVICENAME# parameter is missing or malformed); the fix is to verify the configured service URL.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- Extension Mobility
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 12.5(1) through 15 and SUs
- Checked
- 2026-10-02
Sources
- Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility — Cisco Systems · tier 2 current vendor documentation · Troubleshooting Extension Mobility > Device Name Empty
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Extension Mobility login failures in Unified CM: source note cucm-extension-mobility-troubleshooting-err-207-device-name. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-extension-mobility-troubleshooting-err-207-device-name
BibTeX
@misc{warmtransfer-claim-cucm-extension-mobility-troubleshooting-err-207-device-name,
title = {Troubleshooting Extension Mobility login failures in Unified CM: source note cucm-extension-mobility-troubleshooting-err-207-device-name},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-extension-mobility-troubleshooting-err-207-device-name},
note = {Source note cucm-extension-mobility-troubleshooting-err-207-device-name, checked 2026-10-02}
}