Hi Dipo, looking at that document I believe "install on network" means you must already have an Okta subscription at your company in order to utilize Okta with Jive which is why it is listed as a con.
You can search our Documentation for more information about configuring SSO with SAML. Here is a few to get you started (on Cloud):
Setting Up Single Sign-On
Configuring SSO with SAML
Understanding SSO with SAML
Getting Ready to Implement SAML SSO
If you are specifically looking for ways to auto deprovisioning, you may want to look more into LDAP:
LDAP and Active Directory Guide
Hope this helps!
Is there someone I can talk and do screen sharing?