Which file contains the global Kerberos configuration needed for OpenLDAP integration with Active Directory?

The global Kerberos configuration file needed for integrating OpenLDAP with Active Directory is appropriately found in the krb5.conf file. This file is central to the functioning of Kerberos authentication and provides the necessary configuration settings, including the realm definitions, KDC (Key Distribution Center) information, and other options that govern how Kerberos operates.

When integrating OpenLDAP with Active Directory, it is crucial that the kerberos settings are specified correctly within the krb5.conf file to ensure that the authentication process can communicate properly with the Active Directory environment. This includes ensuring that the correct realm is specified, along with the respective KDC addresses.

The other files listed have different purposes:

• ldap.conf primarily contains configurations specific to LDAP clients regarding how they interact with LDAP servers.

• ad.conf is not a standard file for Kerberos or LDAP configurations and may relate to a specific application or context, but it's not recognized in this general setup.

• smb.conf is used for Samba configurations and facilitates file sharing across different operating systems, rather than affecting the Kerberos setup directly.

Thus, krb5.conf is the correct file to configure for Kerberos in the context of OpenLDAP working with Active Directory.