- Plesk 12.0 for Linux
Plesk license key was upgraded from Web Admin edition to Web Pro or Web Host that includes support for Service Provider View, but Service Provider View is still not available in Plesk > Tools & Settings > Interface Management
License key was not updated on the server: there is still Web Admin edition license uploaded.
Open Plesk > Tools & Settings > License Management and click Retrieve Keys button.
After license is updated, all features that are included into Web Pro or Web Host edition will be available.