Am I able to add $29.99 Stock to an existing CC account.
I currently pay for 3 license and would like to add a Stock account for $29.99, but can only find it if I sign up for a new account?
If you have a CC Teams account you can add Stock licenses via the Admin Console - see Manage your membership and payments | Adobe Stock
Section - Upgrade your Creative Cloud membership to include Adobe Stock membership - scroll down to section "If you already have a Creative Cloud for teams membership"
Keep in mind that if you use the $29/month add to cloud account you will not be able to unsubscribe to cloud without cancelling your entire cloud account.