Adobe Sign trial cannot invite key emails

[Jodi_BMC]

It's impossible to invite any email on our domain because almost everyone has a free account. How am I supposed to actually trial a product when I can't invite the emails from the domain I control? I've attempted to 'claim my domain' but that requires talking to support that Adobe sees fit to completly block trial accounts from accessing. I've never had a harder time trying to test something. 

Please, how can claim my domain and invite the actual users that we'd be using on this system?

thanks

[JV Hand and STone]

Was kicking tires of the Adobe Sign trial.  Everthing going well.  Today I tried to set up account log in and error message.  Log in help is not available on the call menu.   Finding the log in for adobe sign is poorly designed and communicated.