All admins have access to Members activation codes if they have not activated their cell phone yet.
Once you click on the Activation Codes button you will need to make sure you are viewing the correct membership type
If a member has tried their code more than 3 times or it has been over 24 hours, they will need to click Send a new code in their profile screen. Otherwise, you should be able to give them the code and they will be ready to use MCR!