The LDAP user monitor shows DOWN after upgrading to the build 13.1 33.27+ version

To solve this issue, please use "-filter" parameter along with the attribute to fine-grain the search, this filter will fetch the admin information as shown in the below command.

add lb monitor ldap-probe LDAP -secure YES -baseDN DC=ksaaa,DC=loca -bindDN administrator@ksaaa.local -password <> -attribute samAccountName -filter "(|(userPrincipalName=administrator@ksaaa.local)(saMAccountName=administrator))"

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Problem Cause

If the limit on the server is set as 1000 and there are more entries than the set limit, the server responds with the error code "LDAP_SIZELIMIT_EXCEEDED (4)" and when the error code is validated in the response, the monitor is marked as DOWN.