Here you will find the DAUpgradeInstructions_en.htm.

This document explains how to upgrade an existing installation of Discovery Accelerator to version 10.0.2.

Symantec Enterprise Vault Discovery Accelerator 10.0.2 - Release Notes and Upgrade Instructions

It is also part of the install media.

Yeah, read the doc carefully as you are not eligible for DA10.1 or 10,2 upgrade.

Good spot CareFreeX!

Raf999, you will need to first go to DA 9 sp 4 or DA 10 or DA 10 sp 1.  In the Upgrade Instructions you will find this:

Supported upgrade paths

You can upgrade to Discovery Accelerator 10.0.2 from the following versions only:

• Discovery Accelerator 8.0 SP5
• Discovery Accelerator 9.0.4
• Discovery Accelerator 10.0 original release or 10.0.1

For the latest information on supported upgrade paths, see the technical note called Supported upgrade paths for Enterprise Vault, Compliance Accelerator, and Discovery Accelerator (http://www.symantec.com/docs/TECH53174).

OK, so, we should be able to go to 10.0.1.  However, there is another complication, and that is the current DA server is running on windows 2003.  The DAUpgradeInstructions_en.htm which is what I am working with only mentions an in-place upgrade (you login to server, you run the .msi, etc.) which is fine if the server to be upgraded is already running Windows 2008, but that's not the case. 

Can DA 10.0.1 run on Windows 2003?  If not, could you tell me where I can find migration instructions to migrate to Windows 2008 first?