So you need to know if you are running a full installation of Office or only the click to run version
Using regedit locate the following registry key – you are looking for ‘VirtualOutlook’ – if you find that then it is likely you have Office 365 click to run software installed.
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Office\15.0\Common\InstallRoot\Virtual\VirtualOutlook