Share Emails with Oracle sales cloud from Outlook

Summary

Share Emails with Oracle sales cloud from Outlook

Content

Hi All,

We are looking the process of synching emails as activities from  sales cloud outlook to CRM. 

We need to understand for every new email is the user compulsory needs to click the button "share with oracle sales cloud" for synching the emails or is there any process to automate the process without user clicking the option ? 
Is there any way only those emails which are sent to Tenant should be synced and none of the internal email should not be synced ?

Please find the the screenshot for reference