If this is Android look into enrollment which will use separate storage called work profile so you will essentially have 2 independent copies of Outlook. Or it might be possible to have second copy of Outlook depending on your Android flavour. Samsung has Secure Folder for example.
And if these 3 mailboxes belong in same organization, you can utilize delegation and add them as shared mailboxes.
Just to expand on this. There is an Exchange specific wipe feature. I think it is quite old school and not really used. Have seen it, but never tested it myself. As per documentation it can perform device wipe, but only if native mail client using ActiveSync is used not Outlook. And it probably does not work with all native mail clients, depends if app has device admin permissions.
Current Intune MDM model always uses separate Android storage so any operation including wipe will affect only this storage not your personal space so employer can not see nor delete your personal data.
In Intune there is another option without a need of enrolling device (MDM) where you can manage supported apps. It’s called MAM. If wipe is initiated it affects only data in all apps that support MAM.
In short, companies / schools cannot really wipe your device if we are talking about Intune MDM. Other MDM solutions probably can.
Their primary use is enterprise not private consumers. Think of virtualized OS accessible over internet that you can manage/protect and provide for example to some random consultant. Or just provide more powerful PC on low end HW.
It’s costly though and not sure it ever gained traction because there always were alternatives like Citrix Desktops.
And what will be the host from which you will run Cloud PC? Linux, macOS?
Yeah, experience can be wildly different depending who manages environment.