It's easy to send a specific question to a SME. They do not even need to have an account, they will receive an email notification asking for their expertise that will take them directly in to the question to provide their answer.
To assign a question to a Subject Matter Expert, click inside the answer section of the question you need answered in your RFP. Off to the right of the page the Action Menu populates. Click on Workflow, the center tab option, then "Ask and Expert" down at the bottom of the menu.
Another text box will open to be completed with information such as email of the SME and deadline dates you can set. The SME will receive a notification that contains the question immediately.