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A passkey is a digital credential that enables a user to log into an online service without having to enter a password. Instead, the user authenticates using the device-based authentication factor that is already unlocked on their device.
Multi-Factor Authentication (MFA) blocks 99.9% of account compromise attempts. But attackers are finding ways around it. The remaining 0.1% of attacks target specific weaknesses like token theft (up 111% in 2024), MFA fatigue, SIM swapping, and Adversary-in-the-Middle (AiTM) tactics.
You get AADSTS50027 when Azure AD rejects a JWT token because it's malformed, has the wrong audience, expired, or fails signature validation. This typically happens during
When a user gets AADSTS50144: InvalidPasswordExpiredOnPremPassword in a hybrid identity setup, it means their on-premises Active Directory password has expired. Azure Entra ID (formerly Azure AD) cannot authenticate
Outlook or Teams shows error AADSTS50053 with message "Your account is locked" or "Sign-in blocked." Azure AD Smart Lockout has temporarily locked the account
When a user gets AADSTS50144: InvalidPasswordExpiredOnPremPassword in a hybrid identity setup, it means their on-premises Active Directory password has expired. Azure Entra ID (formerly Azure AD) cannot authenticate
When signing in to a Microsoft 365 application or Azure service, error AADSTS50064 with the message "CredentialAuthenticationError - The credential used to authenticate with the authentication scheme
Microsoft Entra Connect sync fails with AttributeValueMustBeUnique error when two or more objects in your on-premises Active Directory share a unique attribute like userPrincipalName or proxyAddresses. The sync
Outlook or Teams shows error AADSTS50076 with message "Due to a configuration change made by your administrator, you must use multi-factor authentication." An MFA policy (Security
Users signing in to Microsoft 365 or Azure services may see "Your sign-in was successful but does not meet the criteria to access this resource" or
When a user tries to sign into an Azure-connected application, they get the error: "AADSTS50034: The user account does not exist in the directory. To sign into
When signing in to a Microsoft 365 application or Azure service, error AADSTS50064 with the message "CredentialAuthenticationError - The credential used to authenticate with the authentication scheme