As ZDNet notes, a lot of people aren't happy about the change. And Microsoft seems to have expected the negative feedback, because its announcement includes instructions on how to exclude the extension from the installation or the upgrade. The tech giant also clarified that users stop can using Bing as the default search engine by toggling it off or by completely uninstalling it from devices. Those whose companies use Office 365 ProPlus may want to take note in case they'd rather search via Google like always.
For now, Microsoft will only forcibly install the extension for customers in certain regions, namely Australia, Canada, France, Germany, India, the UK and the US. However, the company may add other locations over time.