Cisco's LDAPS configuration example uses port 636 with Use TLS checked for the LDAP Directory (synchronization) agreement.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- LDAPS
- Deployment
- on-premises
- Region
- not restricted
- Release range
- CUCM 9.x and later per the document
- Checked
- 2026-10-02
Sources
- Configure CUCM for Secure LDAP (LDAPS) — Cisco Systems · tier 2 current vendor documentation · Configure section, LDAP Directory
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting LDAP directory sync failures in Unified CM: source note cucm-ldap-sync-troubleshooting-ldaps-port-636. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-ldap-sync-troubleshooting-ldaps-port-636
BibTeX
@misc{warmtransfer-claim-cucm-ldap-sync-troubleshooting-ldaps-port-636,
title = {Troubleshooting LDAP directory sync failures in Unified CM: source note cucm-ldap-sync-troubleshooting-ldaps-port-636},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-ldap-sync-troubleshooting-ldaps-port-636},
note = {Source note cucm-ldap-sync-troubleshooting-ldaps-port-636, checked 2026-10-02}
}