When using Oracle features that support Active Directory, ensure that the Active Directory computer can be successfully reached using all possible TCP/IP host name forms to reach the domain controller.

For example, if the host name of the domain controller is server1 in the domain example.com, then ensure that you can ping that computer using all of the following:

• server1.example.com

• example.com

• server1

Active Directory often issues referrals back to itself in one or more of these forms, depending upon the operation being performed. If any of the forms cannot reach the Active Directory computer, then some LDAP operations may fail.