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Change the default LDAP port TCP 389 to Secure Authentication port TCP 636.

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Hello everyone, I have a question regarding the Secure Authentication port (ldapS) of the Active Directory TCP port 636.

Does anyone know if disabling TCP port 389 affects services such as Exchange or other Microsoft services?

Thank you

Tuesday, March 16, 2021 6:13 PM

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Hello, it appears that you cannot due to Active Directory dependencies.

https://social.technet.microsoft.com/Forums/lync/en-US/320777bb-c4f0-4091-82a3-0d86b8809fac/disable-non-secure-ldap-389?forum=winserverDS

https://social.technet.microsoft.com/Forums/lync/en-US/320777bb-c4f0-4091-82a3-0d86b8809fac/disable-non-secure-ldap-389?forum=winserverDS

Steve W.

Microsoft Certified Professional

Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.
- Marked as answer by Fenix2191 Wednesday, March 17, 2021 10:29 PM
Wednesday, March 17, 2021 7:07 PM

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Hello, it appears that you cannot due to Active Directory dependencies.

https://social.technet.microsoft.com/Forums/lync/en-US/320777bb-c4f0-4091-82a3-0d86b8809fac/disable-non-secure-ldap-389?forum=winserverDS

https://social.technet.microsoft.com/Forums/lync/en-US/320777bb-c4f0-4091-82a3-0d86b8809fac/disable-non-secure-ldap-389?forum=winserverDS

Steve W.

Microsoft Certified Professional

Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.
- Marked as answer by Fenix2191 Wednesday, March 17, 2021 10:29 PM
Wednesday, March 17, 2021 7:07 PM

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thank you for your help

Wednesday, March 17, 2021 10:30 PM

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