In Unified CM 15 EMCC, error 37 (Duplicate Device Name) occurs when the same device name exists in both the home and visiting clusters; Cisco recommends disabling autoregistration on all nodes so a new device is not created in the home cluster after EMCC logout.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- Extension Mobility Cross Cluster
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 15 and SUs
- Checked
- 2026-10-02
Sources
- Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster — Cisco Systems · tier 2 current vendor documentation · Extension Mobility Cross Cluster Restrictions (duplicate device); error code table row 37
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Extension Mobility login failures in Unified CM: source note cucm-extension-mobility-troubleshooting-emcc-err-37-dup-dev. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-extension-mobility-troubleshooting-emcc-err-37-dup-dev
BibTeX
@misc{warmtransfer-claim-cucm-extension-mobility-troubleshooting-emcc-err-37-dup-dev,
title = {Troubleshooting Extension Mobility login failures in Unified CM: source note cucm-extension-mobility-troubleshooting-emcc-err-37-dup-dev},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-extension-mobility-troubleshooting-emcc-err-37-dup-dev},
note = {Source note cucm-extension-mobility-troubleshooting-emcc-err-37-dup-dev, checked 2026-10-02}
}