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You can verify this by using the Fiddler or TCPView tools to monitor the attempts to connect to the and servers. Somewhere in the fall of 2016, an update was released for Outlook 2016 that enabled a mandatory check of the connection endpoint in the Microsoft 365 (Office 365) cloud. Make sure Anonymous Authentication is not selected here.ĭisable Office 365 Autodiscover in Outlook If you have a Microsoft 365 (Office 365) mailbox connected in Outlook, this tab should have an additional field Logon network security. If you are using GPO administrative templates for MS Office, this setting can be configured with the policy parameter Online Content Options = Do not allow Office to Connect to the Internet under the following GPO section: Administrative Templates -> Microsoft Office 2016 -> Tools | Options | General | Service Options -> Online Content.

If you lose your security info and you don't have a backup contact method available, you can permanently lose your account.įind out more about the Microsoft Authenticator app. Note: Before you turn on two-step verification, make sure you've associated at least three unique security contact email addresses or phone numbers with your account for backup purposes. Under the Two-step verification section, choose Set up two-step verification to turn it on, or choose Turn off two-step verification to turn it off.

Go to Security settings and sign in with your Microsoft account. If you've turned off two-step verification, you'll get and resend security codes periodically, along with any time there's a risk to your account security. If you don't want to use email, a phone call, or text, you can use the Microsoft Authenticator app to help strengthen your account security and to sign-in without passwords. Every time you sign in to an untrusted device while you have two-step verification turned on, you'll get a security code in email or on your phone, making sure you’re you.