How can I provide Account team access to Leads?

A user with the IT Security Manager job role can provide access to the leads associated with an account team by creating a new data security policy for the Sales Lead database resource.

Using the security console, they can specify the access level such as view or update sales lead data, and then assign what role, such as Sales Representative or Sales Manager, to apply to the security policy. Finally, they must specify a condition for the new data security policy. For example,

Access the sales lead for table MKL_LM_LEADS where they are a member of the lead sales account team or in the management chain
      of a lead sales account team member.

For more information, see the Create a Data Security Policy for a Database Resource section in the topic Manage Database Resources topic of the Oracle CX Securing CX Sales and Fusion Service guide on Oracle Help Center (https://docs.oracle.com).