In the Source Server Authentication screen or the Target Server Authentication screen, if the Use SSL option is not selected, then authentication to the server fails.
If you do not want to use a secure connection, deselect the Use SSL option.
When this option is not selected, ensure that TLS is disabled for LDAP on the source server. In iManager, select LDAP > LDAP Options > LDAP Group-server_name > Authentication Options, then deselect Require TLS for Simple Binds with Password.
To use a secure connection, select the Use SSL option (default setting).
When this option is selected, ensure that TLS is enabled for LDAP on the source server. In iManager, select LDAP > LDAP Options > LDAP Group-server_name > Authentication Options, and select Require TLS for Simple Binds with Password (it is selected by default).