How can I remove ‘Dark Mode’ from Ms Office apps without disabling it across macOS?

I am running macOS Mojave and have Dark Mode set as my default appearance in Apple > System Preferences > General.

I recently updated MS Office on my Mac and the latest MS Office update (i.e. version 16.20) supports Dark Mode. However, unlike many other apps, there is no way to enable/disable this appearance within the app itself.

Since I much prefer the usual appearance of my MS Office apps, but still want to use Dark Mode within macOS, how can I achieve this outcome?