>>I see 1 "issue": Third-party access. Turn off less secure app access. When I click on this link it brings me to the next page (image 3)
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>>And here is my confusion. If I click on TURN OFF button, will it affect my access to gmail email from iPhone and iPad? I don't understand what they (Google) mean by "less secure app access".
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>>Anybody had this experience? If yes, did you clicked on TURN OFF?
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>As a test, I TURNED OFF access to one of my gmail accounts from less secure applications. What happened next is I cannot receive emails to this gmail account in my Outlook 365. So Google consider MS Outlook Not Secure?

SWAG is that you should first check if crypto is/was enabled in Outlook