I have been trying to reduce unneeded internet traffic at our site of late, due to poor speeds on the connection

I noted a lot of traffic to Office online help – specifically
Doing a bit of digging and it seems office 2010 and 2013 connect to this address automatically at startup and download stuff.
At our site it was roughly 1 – 1.5 Gig a day!

Changing the Office 2010 registry key
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\C ommon\Internet\UseOnlineContent
Or Office 2013
HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\C ommon\Internet\UseOnlineContent

To REG_DWORD value 0

Disables this and frees up that bit more bandwith

I’ve pushed this out via Group Policy preferences, but you could just as easily use a login script or modify mandatory profiles.

Hope this is helpful