Why I'm not able to login my outlook account in mail app in iPhone

I have several people who lost connection on the iPhone mail app on Saturday and are not able to connect today.
The only thing that works is installing Outlook instead of using the native ios mail app.

Dear MOHAMMAD TAUQUEER ANSARI,

Thanks for using Microsoft products and posting in the forums!

From your description, I understand that you seem to be experiencing an inability to add an Outlook account in the iOS Mail app;

In order to better help you identify the problem, I need to gather the following information with you, thank you for your cooperation:

1, Did you get an error report while adding outlook account, can you provide some details screenshots?

2, What version of iOs do you have?

3, What protocol was used during the adding process (POP/IMAP/Outlook.com)?

In order to peel off the problem more quickly, I suggest you first go to webmail outlook.live.com through a browser, to check if you can login normally there. The purpose of doing this is to eliminate as many interruptions as possible, webmail synchronization is fast and good, so that you can easily figure out whether the problem is with the email account or with the Mail app for iOS.

If you can send and receive emails normally on webmail, it means that the problem is with Mail app; it is recommended that you update iOS to the latest version first, the update can often solve some unknown problems.

After updating the Mail app, re-add the Outlook email account to the Mail app, this step can focus on verifying the password issue, make sure you enter the correct password and configuration parameters, when adding an email account on phone, usually chooses outlook.com or IMAP.

Feel free to share more and let me know if you need any further assistance.

Best regards,

Harris-MSFT |Microsoft Community support specialist

Any idea how I fix my phone I'm clueless! Personal GMail isn't downloading, app store won't load keeps saying retry - can't access my banking app. Everything just keeps trying to load then doesn't or freezes or won't open at all. Unable to restore deleted apps as I can't even get in the app store. iphone 14 with new upgrade last night to 18.3.1 - now nothing works.

not that I can see, but I got that from a Microsoft service health posting, not apple

Is there any information about not being able to connect to App Store? I updated to 18.3.1 last night and I'm not getting mail, can't access any apps - when I go to them they are super slow...and when I uninstalled them, I can't open the App store to put them back on my phone. I'm so frustrated.