> Does Amazon provide company phones or just install an MDM profile on your personal phone?
> Microsoft does the latter, so it wouldn't surprise me if Amazon does likewise.
Not true (source: current MSFT employee). More detailed explanation below, as neither former nor latter describes MSFT accurately.
So, for most teams and positions (there are many exceptions), you don't get a dedicated work phone. So yeah, if you want to access work stuff on a mobile device, you need to install MSFT MDM on your personal phone, and they will, allegedly, be able to control stuff on it (depending on the device itself and how MDM is configured).
However, there are no requirements to do it. You can simply not install any work-related stuff on your phone, so you won't need an MDM. I simply don't access any work resources on my personal phone. If I need to do work, i open my work laptop. If they want me to use work apps on mobile and be accessible, they should provide a company phone for this.
There have been zero conflicts around it on my end, even after multiple years of working there on multiple different teams. Not once have I even got an implied request from anyone (managers, colleagues, etc.) to be accessible on mobile (except for when I am on-call, but for that, they just need my phone number, not any specific apps installed on my phone, and everyone knows it) or any questions about it. Everyone is totally cool with people not being glued to their work apps on their phones on their own free time.
But you are correct, those who choose to use work apps have to give MDM permissions to their personal devices or buy a dedicated device for that (exceptions apply, because there are some teams that provide dedicated work phones). However, unless it is required for the job to be able to use work apps on your mobile device, I think it is fair if they don't provide a work phone. Makes it easier for me to not check on any work stuff during the weekend.
Yes, you're correct, and I didn't mean to imply that MSFT forces employees to install their MDM on personal devices. It was optional for me as well, with a large full-disclosure prompt stating that they can remotely wipe your device if you proceed with mobile setup.