SCCM updating Office 365 source install files.
SCCM should be able to update the Office Source files when new builds of Office are out. This should be able to be done in the background and automatically. I work with the Office Deployment team have had many customer upset that they need to update the source files for installs.
Steve Whitcher commented
I'm out of votes at the moment, but definitely agree that this should be a thing. When creating an Office 365 Installer, there should be an option to always install the latest version from the channel selected. SCCM would then check for updated install files periodically, and update the local copy as needed. This way, a single Office 365 ProPlus application can always be used to install the current version, instead of having to create a new application every few months to avoid installing an out of date version that immediately requires a bunch of updates to be installed.