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Mark @accountprotection.microsoft.com as a trusted sender to receive your verification code in your inbox. Randomly still getting the 'can't find this page' error upon first connection.. When you close it and reconnect, it then goes through as expected. It's also intermittent, sometimes goes in first time round.. Other times get the error, close the window, reconnect then it works.
- When you close it and reconnect, it then goes through as expected.
- To investigate further, ask an IT administrator to look at the Microsoft Entra sign-in logs.
- If you suspect someone else is trying to access your account, contact your IT administrator.
- The error could be caused by malicious activity, misconfigured MFA settings, or other factors.
- When I switch from company's Teams to client's, I am asked to log in.
I can't sign in after multiple attempts
Should you not wish or not be able to use an app you can choose the phone (text) or alternative phone method and provide a phone number, this data is only used to support the security of your account. To change the language, you need to remove it and re-add the security info to your account using the steps above. If you don't know, or have forgotten your password, and you don't have access to any of your security info for verification, follow the steps below to recover your account. There may be heavy compromised traffic coming from your geographical location and to protect you, we may also not deliver codes to your account as fast clear Outlook credentials manager as we would like. While rare, these issues will be automatically resolved after a certain period of time. There are a number of possible explanations for why verification codes don't always arrive.
Further help and support
Outlook still keeps prompting ONLY with the old school grey box. It's indicating that the MFA must be done, but nothing's opening/prompting for it. OWA, Windows sign-in, and Outlook mobile resolve Outlook not sending emails fast app proceed to the MFA registration and/or use.
I've lost access to my security info
Read through the list of the most common causes, and see if any of them apply to you. Security verification messages are sent in the language of your account when the security info email/phone number was added. We won't ask you to verify your security info every time you sign in. Occasionally, we might ask you to check it again—for example, if you haven't signed in for a long while.
Troubleshooting common problems with Multi-Factor Authentication (MFA)
If you don't recognize the phone number or email address offered when trying to get a verification code, check these things. Disconnected and reconnected (no MFA second time round) so will wait an hour and see if this prompts for MFA again. I have connection status shows disconnected 'single sign out' enabled on my saml auth profile.
Log off, log back in again and does not prompt for MFA anymore. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Find solutions to common problems or get help from a support agent. If you are sure the email address is correct, you may need to recover your account.

If you've tried these steps but are still running into problems, contact your organization's Help desk for assistance. If you're an admin for Microsoft Entra ID and need more support, contact global support phone numbers. If you no longer have access to the phone number or email address, or you need to add another way to sign in, select I don't have any of these when trying to sign in and follow the prompts. This will forget all Wi-Fi networks and passwords, mobile settings, Virtual Private Network (VPN) and Access Point Name (APN).