The following error occurs while trying to add a directory item under Control Panel -> Directory Integration in the DSM Explorer:
LDAP Extended Error - Please consult extended information and the DSM log files (GUI/CMM)" Details: "Extended Error : Failed to contact and/or read from the LDAP directory. Please ensure that the correct details have been entered. LDAP Error Reason : The LDAP server was not contactable"
The above error can be found in TRC_GUI*log along with the following one:
211211-14:46:22.0427714L|008472|00002ef0|GUI |GUI_DIR |adlookup.cpp |000047|ERROR | Failed to get DC. Error code = 1355
Basically the error "Failed to get DC. Error code = 1355" is related to a failure while connecting/looking up for the DC of the domain.
What can be done first is to test the connection of the DC Domain with the command:
ping <DC Domain>
If it fails, check for DNS resolution.
An alternate workaround is to add the DC Hostname in the Domain Manager / AD hosts file to be able to add the directory item.