Endpoint Protection occasionally blocks Google Drive and Calendar

Hi,

For some reason Endpoint Protection appears to intermitently block Google Drive and Calendar on some users machines. Disabling endpoint protect restores the users capability to access these sites, but otherwise there appears to be no rhyme or reason and to when and for how long this might occur.

Does anyone know why this may be or what I can begin to look into, to solve this issue?

Thank you for any response.