Hi,
Do it first,
Microsoft - Evernote Add-Inn's for Connection Problem
After that, when you install Evernote, signup and open both program, Evernote and Outlook..
Check Add-Inn's in Outlook. If these buttons not checked, check.. If there in not buttons for EverNote, Read article which shared above.
After that, Check your Outlook File Options.
Because of the speed of Evernote, Outlook blocking Add-Inn's. It is almost 1.5 sn..
Allow the notfication. After that you will see an active icon on your tab in outlook.