Error 400 when signing, and do not have any other authentication method. I still have access via phone email app.

Question

Error 400 when signing, and do not have any other authentication method. I still have access via phone email app.

Anonymous

Hello,

I am not able to sign in into my main outlook account. When I try to, i get sent to a blank page with the following message:

‘Please retry with a different device, use a VPN, or other authentication method to sign in. For more details, please see https://go.microsoft.com/fwlink/?linkid=2317517'.

I then press on the link and it takes me to a page that says 'Error 400 when signing in'. I go ahead and follow the instructions of the 'Sign-in helper'. Where it says

‘Choose how you normally sign in, then enter your details’ I write my e-mail.

The answer I get is: ‘Account check failed. Sorry, we're experiencing issues checking your account’.

I have recently been travelling and when I tried to enter my account abroad on a new computer, I was not able to, but I was still able to login via my phone browser abroad.

Now I am back home and when I trie to login in with my regular computer I get the above message again. But still, for a day or so, I was able to access my account using my phone browser when I got back.

Now, that is not working either, I am receiving the same message.

There is still one way I currently have access to my account, and that is through my phone’s mail App. I would appreciate some direction regarding where and what I could do to recover my browser login access.

I do not have any phone number or other mail account associated to this e-mail, so i cannot authenticate it in that way. I do however still have access to it through my phone mail app, so I am a bit apprehensive to start the recovery process in case I am not able to answer the questions asked correctly... It is a very old account and I cannot remember the country i made it in, or if I even wrote the correct date of birth (i made it before we were all sure the government had all our information, so in my naive ignorance, now stupidity, I might have thought that I could beat "The System" by putting a random date of birth).

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Answer 1

Hello, Thank you for posting this issue on community forum. As I understand, you cannot log into your Outlook (Microsoft) account due to the Error 400. I shall investigate this issue and assist you accordingly towards its resolution. Based on the Error 400, it appears it might be a network issue.

As a workaround for the meantime until the issue gets resolved, please follow these steps to see which one of them resolves the issue:

Please ensure you are connected to the Internet and the connectivity is fast, strong and stable to avoid any authentication errors and successfully log in and access your Microsoft account.
Kindly try to log into and access your Microsoft account (switching between Outlook.com Webmail, Outlook client app, or Outlook mobile app) from a different device using a different network such as Work or Home network and even use a different Internet connection such as an Ethernet cable or network, Mobile (Data) i.e., Cellular network or Wi-Fi network or a different Wi-Fi network.
Try to restart your Ethernet or Wi-Fi connection modem and router, as sometimes, a simple restart can resolve temporary glitches.
Microsoft is investigating the issue towards resolution. Kindly wait until this issue is resolved on Microsoft's end. However, there is no exact Estimated Time of Arrival (ETA) as to when it would be resolved.
Also, please check with your Internet Service Provider (ISP) to see if there is any issue on their end.
If the issue still persists, please add a new account in Outlook.com or New Outlook following the steps provided on the page at the link and check if you can log in and access the email account: Add an email account to Outlook for Windows - Microsoft Support If you experience any issues, please feel free to revert.Sincerely,Bill | Microsoft Community Moderator.