These should be the proper settings you'll want to plug into your droid assuming you're just using the standard AKO and not the beta-mail which runs exchange 2010.
I got this information from https://militarycac.com/akomobile.htm give it a try, and I hope it works for you.
The incoming mail server is: imap.us.army.mil
The outgoing mail server is: mailrouter.us.army.mil
Do not use secure password connections (SPA)
The incoming port number is: 993 (you may not be able to select this)
The outgoing port number is: 465 (you may not be able to select this)
For both incoming and outgoing mail server, use SSL (Secure Sockets Layer)