I'm getting really annoyed with the contant try outlook pop up everytime I open mail, Outlook has auto installed without my consent numerous times and have had to uninstall it, I wish ms would just get the message "I do not want outlook", I like my mail app period. Would not this constant pressure by MS to install Outlook be classed as intimidation, harassment and bullying, which is illegal in my country, the whole thing is getting to me mentally as I feel MS are abusing me, I'm frightened to update windows(not done for last 3 months), I read now they are pushing malware adds on our pc's, and also read they are trying to stop us having offline accounts with newer updates. If there were a lawyer out there where we could all join a group lawsuit for compensation for these constant intimidation tactics by MS count me in. It is my personal copy of Windows, It is my right to have on my PC what I want not the corporate bullies at Microsoft trying to intimidate me and trying to force me to have things I do not want, either through adds or pop ups.
I think I have found a way to keep my old mail app, I just updated windows after months of refusing too, and as soon as my pc rebooted, outlook was there as my email app. I tried uninstalling outlook, but every time I did it reinstalled again when opening the mail app, but think I have fixed and now have my mail app back without the outlook pop up, I followed advice from Nlite.com and went to below in registry.
[-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe\OutlookUpdate].
I deleted the OutlookUpdate file, rebooted my pc and hey presto no more Outlook, I have my mail app back and the annoying try outlook pop up is also gone, although the switch still remains, everything seems to be working fine so far, I am sending and receiving mail as normal. I am annoyed that Microsoft are trying to force this app, prior to updating windows I ran app update via MS store and my mail app had an update, so it is being updated still.