Setting up default font in Office apps and other apps

We would like to set ARIAL as the default font for all users within the organization on all the apps (Office, Adobe, Outlook) etc... How can we go about doing this in a simple an in an efficient way. I tried using Group Policy, but this is only if you want to make other fonts as default other than the one that is available. We want ARIAL as the default when we launch MS WORD instead of Calibri which seems to be the default. We do not want this to be set by users, but we want to make sure that it reflects in users apps.

Thank you