Directory Server Enterprise Edition 6.3.1 is a maintenance release that is applied to an existing installation of Directory Server Enterprise Edition 6.0, 6.1, 6.2, or 6.3. You can download Sun Java System Directory Server Enterprise Edition 6.0, 6.1, 6.2, or 6.3 software from the following location.
http://www.sun.com/software/products/directory_srvr_ee/get.jsp
The download page serves as a starting point to direct you to the proper downloads depending on the distribution type you need to download. Directory Server Enterprise Edition 6.3.1 is available in the following distributions.
Native package distribution
Zip distribution
Directory Server Enterprise Edition 6.3.1 is available in the following forms.
Native patch – patches to upgrade Directory Server Enterprise Edition 6.0, 6.1, 6.2, and 6.3 native packages installed using the Java ES installer.
Zip based distribution – patches to Directory Server Enterprise Edition 6.0, 6.1, 6.2, and 6.3 zip installations.
Directory Server Enterprise Edition 6.3.1 patches are available through SunSolve.For information on patch numbers, see Installation Instructions.
For the detailed information on what you need to install based on your current installation, refer to Installation Instructions.