Agreed - tried it for similar reasons. Crashed and burned.My National TA unit has been ordered to use it for passing all information in order to 'Maintain Security'.
The tortuous log in process means that everyone (bar myself of course) has set the e-mail function to forward. Result the e-mails still go to everyone's own server only a day late.
This is where the Army misses a trick. The vast majority of the TA, despite having to use JPA and DII for routine business, dont have access outside training and drill nights.Even then, the DII termibnals are hogged. If there was a Armynet portal into a cut down version of DII and JPA, so that TA soliders look at their mail, and interact with stuff like SJARs and OJARs that would be a winner.
JPA is hardly Top Secret, and having access via a secure web portal would give folk back a lot of time.
That said, I find Armynet quite useful to look at the MS stuff and other things, but the security requirements are onerous. My civvy firm manages with single sign on - why cant we?