Side-loading is no longer necessary. Since last November Microsoft Office is available on all Chromebooks with Android app support: https://www.theverge.com/201

Side-loading is no longer necessary. Since last November Microsoft Office is available on all Chromebooks with Android app support: https://www.theverge.com/2017/11/27/16703952/microsoft-office-now-available-on-all-chromebooks https://www.theverge.com/2017/11/27/16703952/microsoft-offic... There's even an Office support page: https://support.office.com/article/how-to-install-and-run-microsoft-office-on-a-chromebook-32f14a23-2c1a-4579-b973-d4b1d78561ad https://support.office.com/article/how-to-install-and-run-mi... Also, the Office apps do work offline.