Do we need to be on 4.91 for Single Sign-On to work?
Yes. All hosted standalone customers were upgraded to 4.91 on the weekend of August 5th, 2016. All ResearchPoint customers have what they need to enable the Blackbaud Omnibar. However, we planned it in a way so we could purposely enable the sign-on for groups of customers at a time, not all at once. You'll receive a notification before it's your turn. When it's your turn, we'll be the ones to enable Single Sign-On for your database.
However, we should note that enabling the Blackbaud Omnibar with single sign-on support is not tied to a release upgrade. We enable this separately. So for example, the upcoming release of ResearchPoint to 4.92 will happen separately from the single sign-on work.