I have set up a policy on our local Good Control server wih Good Work as the delegated authentication app for SmartOffice and I can authenticate SmartOffice via Good Work.
It may be useful to try to narrow down the environment - could you please let me know what model of android devices you are using, and also whether you are using a Good Dynamics hosted setup, or an in-house corporate Good Dynamics environment?
If your company hosts its own Good Dynamics servers could you check with your IT department whether they have enabled SmartOffice for you and other users please?
I'm happy for you to pass on our support email to either your in-house IT team or to the Good support team to help resolve the issue. Please use firstname.lastname@example.org which is the SmartOffice dedicated support account.
I have also noticed on some devices that the initial authentication dialog does not show any text. I have not yet identified the cause of this, but it is actually drawing white text on a white background - I experimented a little and found that if you tap on the dialog just below the list of authentication apps (such as Good Work) there is a link to enter email/token details. Tapping the (hidden) link brings up the email/token dialog, which should at least allow you to authenticate the app for now while we try to resolve this issue.