There is also a setting for SAML specifically to enable disabled accounts when then login (General SAML Integration Settings) which a Full Admin user can update the setting any time you would like:
Enable disabled user account on login
Enable this setting to reenable a disabled user's Jive account when s/he logs in.
Per Which SAML SSO Settings require a restart?, the setting will be immediate.
Technical Account Manager
Thanks, Ben! That is exactly what was needed. Perfect!