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That must be frustrating. :(

I have two such accounts that I used with my Mail client, both of which are MFA'd, and both of which work fine. Must be some setting server side that accounts for the difference.
 
There is a server side switch to prevent the OSX native mail client. It is controlled by your IT Department in the O365 admin console. That’s the error you get if it’s utilized. Most likely your IT dept is trying to prevent the native mail client and force you to Outlook.
 
Sorry, it’s not that, even though that‘s good info. This process and functionality was sound on beta 1 and iOS 13 before that, stopped working hard on beta 2, came back mostly on beta 3. My kids were taught in math class that about dependent and independent variables, I certainly don’t recall those terms when I was in school but the server is the independent variable here.

I’m happy that it’s working though, because it’s better than ios13 by far for me
 
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This has worked in the past, posted in case its useful to anyone, pass this to your IT dept.

When you add the mail account to an 'i device', unless this account has admin rights, you will be presented with the screen that you see, you can get around that by temporarily enabling Integrated Apps.

If you go onto Office 365 exchange portal and navigate to Settings> Services & add-ins > Integrated Apps and turn the slider to 'ON', you will probably find that you can now add the account.

https://support.office.com/en-us/article/turning-integrated-apps-on-or-off-7e453a40-66df-44ab-92a1-9...

Once you're done, make sure you turn the Integrated Apps back off again (this wont affect the users already setup, it's just for new ones) as there is a vulnerability that could be exploited.
 
This has worked in the past, posted in case its useful to anyone, pass this to your IT dept.

When you add the mail account to an 'i device', unless this account has admin rights, you will be presented with the screen that you see, you can get around that by temporarily enabling Integrated Apps.

If you go onto Office 365 exchange portal and navigate to Settings> Services & add-ins > Integrated Apps and turn the slider to 'ON', you will probably find that you can now add the account.

https://support.office.com/en-us/article/turning-integrated-apps-on-or-off-7e453a40-66df-44ab-92a1-9...

Once you're done, make sure you turn the Integrated Apps back off again (this wont affect the users already setup, it's just for new ones) as there is a vulnerability that could be exploited.

My IT already said they won’t do that and said it shouldn’t be necessary, so it’s still a bug in iOS 14. It works perfectly fine on 13.
 
Has anyone found a solution to this issue? I'm on the most current public beta of iOS 14 (beta 5, I think) and had to reset my password for my office email account (Office 365 exchange account), and now when I try to update the password for the iOS Mail app for that email account by pressing on "Re-enter Password", I get a screen flashing really quickly (can barely read part of it) and it looks like something saying login.live.com... flashes across screen. I then get the message "Account not authenticated". Thanks for any help
 
Not a good one, no, for a time it seems to work and then it just stops and the only way I can get it to wake up is to go to my work phone which is still running 13 and refresh emails on there. As long as the devices are on the same WiFi it seems to then pass a token to the iOS 14 devices and they work again for a bit. I know I might not have quite the right logic to how it is fixing itself technically but the steps do work reproducibly, re-adding the account doesn’t help long term either. Have out in a feedback each time they push out a new beta. Please do so also. It is not cool and I loathe Outlook on the iPad
 
Just checked the feedback app a few minutes ago and as it refreshed it went from “less than 10” to “more than 10” so if it helps anyone still struggling you are not alone, this is real. Hoping for a new release in a little under 5 hours per the other threads in here and will see if anything improves but also a realist
 
Indeed not but then just yesterday our central IT made the whole thing moot for me: told us that by the 30th they are cutting off access to anything but Outlook so although that is tiresome in and of itself it does give me closure on this front
 
Ugh... GM and still not working
I came here to say that. I reached out to a friend in my IT department and he said, "I'm pretty sure we've asked people to use the Outlook app," so I am not confident that my IT department is going to do anything to fix this server side.
 
I deleted the account and then added it back, and suddenly it’s working on both my iPhone and my iPad. I wonder if Microsoft changed something on their end.
 
I came here to say that. I reached out to a friend in my IT department and he said, "I'm pretty sure we've asked people to use the Outlook app," so I am not confident that my IT department is going to do anything to fix this server side.

Literally same response from mine hahaha
 
I got the prompt today when I upgraded to the iOS 14 release and tried to sign in on my exchange account, and I submitted the request through the dialog.

I got a response from the campus IT guy who gets the exchange emails, apparently. His response was essentially, "what is this request? Why am I getting this from Microsoft?"

I told him "Hoo boy, you've got a couple thousand users whose phones are going to start auto-updating overnight tonight. Buckle up."
 
Last night my company sent out an email acknowledging the issue after that is seen updating to iOS 14 and urged employees not to do it if they don’t want to use the Outlook app until they find a fix.

So at least they are aware of it company-wide now and hopefully will get whatever fixed in the backend to make it work.
 
Last night my company sent out an email acknowledging the issue after that is seen updating to iOS 14 and urged employees not to do it if they don’t want to use the Outlook app until they find a fix.

So at least they are aware of it company-wide now and hopefully will get whatever fixed in the backend to make it work.
My company has the same issue. Just started with people updating to the new iOS today. So far over 200 phones with no email, before the Helpdesk could get a warning out to the rest of the company to turn off the auto update. Sadest thing is that this issue was clearly identified back in the spring. So someone please explain the purpose of beta testing and user forums to Apple!
 
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Hmm interesting issue. I have an iPad on iPadOS14 and no issues so far on the mail app. I’m part of the IT team and so far no tickets yet although we have moved most employees to Outlook application over native mail. However the higher ups use native mail and they would be the first ones to complain. Maybe they’re on iOS13 still.
 
you can fix it by adding the email via imap protocol manually, BUT doing that you will have no access to calender sofar. mac despite ipad and iphone is not affacted.
 
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