So this Jive instance is not a sandbox =) Assuming you meant out public Sandbox, and unfortunately ... no we cant alter the identity mapping of the sandbox globally to test an Okta configuration =\
Wish I had a better answer for you. If you have a Preview instance at your disposal or UAT, that would be the best time to test the new version.
Thanks for your reply, Ryan.
Unfortunately, that's all we can do. (Or can't do, actually.)