When you disconnect from Enterprise Cloud, the Connect App is deleted from your enterprise account and credentials stored on your Enterprise Server instance are deleted.
In the top-right corner of Enterprise Server, click your profile photo, then click Enterprise settings.
On the left side of the page, in the enterprise account sidebar, click Connect.
Under " Connect", to the right of the enterprise account you'd like to disconnect, click Disable Connect.
Read the information about disconnection, then click Disable Connect.