I'm looking for a two factor authentication solution to use within a Windows Active Directory environment. I prefer the solution to be hosted. Worst case is that I have to run the solution as a VM that I can also run at a DR site. No appliance.
I envision my users coming into the office and sitting at their computer. They enter their work password and then their two factor token. This would be the same for OWA or RRAS.
What options are out there?