Cisco lists a misconfigured LDAP port in the LDAP Authentication window as a possible cause of end-user login timeouts.
Checked 2026-10-02
Login fails for end users. Authentication times out before the user can log in.
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- LDAP authentication
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 12.5(1) troubleshooting guide
- Checked
- 2026-10-02
Sources
- Troubleshooting Guide for Cisco Unified Communications Manager, Release 12.5(1) - Cisco Unified Communications Manager System Issues — Cisco Systems · tier 2 current vendor documentation · LDAP Authentication Fails
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting LDAP directory sync failures in Unified CM: source note cucm-ldap-sync-troubleshooting-auth-timeout-port. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-ldap-sync-troubleshooting-auth-timeout-port
BibTeX
@misc{warmtransfer-claim-cucm-ldap-sync-troubleshooting-auth-timeout-port,
title = {Troubleshooting LDAP directory sync failures in Unified CM: source note cucm-ldap-sync-troubleshooting-auth-timeout-port},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-ldap-sync-troubleshooting-auth-timeout-port},
note = {Source note cucm-ldap-sync-troubleshooting-auth-timeout-port, checked 2026-10-02}
}