Yep, it's been like that for many years. Well before the pandemic. Everything is proxied through distributed MSFT proxies.
As far as I know, there is no way to turn it off and "regular" functionality doesn't even exist in the mobile apps anymore. The Outlook mobile app itself is a basic proxy client. I believe the new Outlook is now, or is in the process of becoming the same.
4 comments
[ 0.53 ms ] story [ 6.6 ms ] threadWindows 11 Update 23H2 is stealing users' IMAP credentials (666 points, 278 comments) https://news.ycombinator.com/item?id=38212453
And 2024
Microsoft's new Outlook client moves your email to the cloud (2023) (162 points, 131 comments) https://news.ycombinator.com/item?id=41666945
### Inflammatory too (2023):
Microsoft lays hands on login data: Beware of the new Outlook (231 points, 113 comments) https://news.ycombinator.com/item?id=38219568
New Outlook sends passwords, mails and other data to Microsoft (150 points, 25 comments) https://news.ycombinator.com/item?id=38233694
Microsoft steals access data: Beware of the new Outlook (161 points, 40 comments) https://news.ycombinator.com/item?id=38217457
https://www.securityweek.com/researcher-calls-out-microsoft-...
As far as I know, there is no way to turn it off and "regular" functionality doesn't even exist in the mobile apps anymore. The Outlook mobile app itself is a basic proxy client. I believe the new Outlook is now, or is in the process of becoming the same.