Unable to activate RMS on O365 E3 tenant

If I try to activate RMS on any of my Office 365 Trial Tenants (E3), after approx. 15' I'm getting the following message:
Windows Azure Active Directory - PREVIEW:
"The page you were viewing has timed out."
If I hover ofer PREVIEW, I'm getting the following info:
"Welcome to the Windows Azure Active Directory preview portal. The preview portal is currently running with certain limitations and restrictions as we work out the kinks."
Q: Any ideas for how long that is going to be the case? I'd like to demonstrate RMS in front of a customer soon.                           

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Pasci