Oracle Management Service (OMS) uses the Internet connectivity on its host to connect to My Oracle Support periodically to download patches, patch sets, patch recommendations, and Automated Release Updates (ARU) seed data. By default, Enterprise Manager Cloud Control assumes that there is no proxy configured between the OMS and My Oracle Support. However, to secure the communication, you can add a proxy between the two entities.
If you have already configured a proxy, then this setup task appears as if it is complete.
Set Up OMS My Oracle Support Proxy
From the Setup menu, select Initial Setup Console.
On the Initial Setup Console page, in the left panel, click My Oracle Support.