LDAPS Connection Error - Unknown Hostname
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02-27-2026 07:11 AM - edited 02-27-2026 09:49 AM
I've been trying to connect with LDAPS without any luck.
Our current connection to LDAP works completely fine if we use the IP address with the following format ldap://192.158.1.38:389/
After we installed the certificate I'm facing the following error
Error Message ldaps://example01.server.corp:636 Unknown host example01.server.corp
Verify server address and port are correct and accessible
The certificate was issued with the following name values:
example01.server.corp
server.corp
SERVER
Why am I getting an error when connecting to LDAPS?
UPDATE: The following powershell scripts were executed on the MID Server
Test-NetConnection 192.158.1.38 -Port 389 Successful
Test-NetConnection 192.158.1.38 -Port 636 Successful
Test-NetConnection example01.server.corp -Port 636 Error
Test-NetConnection server.corp -Port 636 Error
Note: I've changed the ip address and hostname values with samples for disclosure
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02-27-2026 09:51 AM
Updated the post with possibly relevant PowerShell scripts and their respective results.
