The following registry change can be made if you'd like to update Office 365 software (i.e. Word/Excel/Outlook) from Semi Annual to Monthly Channel. This is definitely the recommended setting if you have the Office 365 subscription to ensure you're always getting the most up to date software.
Open Regedit and navigate to the following:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\Configuration
Search for CDNBaseUrl
Semi-Annual Channel: http://officecdn.microsoft.com/pr/7ffbc6bf-bc32-4f92-8982-f9dd17fd3114
You can simply replace the URL within the key with one of hte above, depending on what you want to set. Once you've done this, you can re-open the Office app and search for updates. It'll start updating.
