#Fusionfall legacy signin password#

Legacy authentication refers to basic authentication, a widely used industry-standard method for collecting user name and password information. Scenario descriptionĪzure AD supports several of the most widely used authentication and authorization protocols including legacy authentication. Conditional Access isn't intended to be an organization's first line of defense for scenarios like denial-of-service (DoS) attacks, but it can use signals from these events to determine access. This article assumes that you're familiar with the basic concepts of Azure AD Conditional Access.Ĭonditional Access policies are enforced after first-factor authentication is completed. Customers may choose to first begin disabling basic authentication on a per-protocol basis, by applying Exchange Online authentication policies, then (optionally) also blocking legacy authentication via Conditional Access policies when ready.Ĭustomers without licenses that include Conditional Access can make use of security defaults to block legacy authentication.

While rolling out legacy authentication blocking protection, we recommend a phased approach, rather than disabling it for all users all at once. This article explains how you can configure Conditional Access policies that block legacy authentication for all workloads within your tenant. If your environment is ready to block legacy authentication to improve your tenant's protection, you can accomplish this goal with Conditional Access. Azure AD accounts in organizations that have disabled legacy authentication experience 67 percent fewer compromises than those where legacy authentication is enabled.More than 97 percent of credential stuffing attacks use legacy authentication.More than 99 percent of password spray attacks use legacy authentication protocols.The numbers on legacy authentication from an analysis of Azure Active Directory (Azure AD) traffic are stark: This is because legacy authentication protocols like POP, SMTP, IMAP, and MAPI can't enforce MFA, making them preferred entry points for adversaries attacking your organization. Read more hereĪlex Weinert, Director of Identity Security at Microsoft, in his Mablog post New tools to block legacy authentication in your organization emphasizes why organizations should block legacy authentication and what other tools Microsoft provides to accomplish this task:įor MFA to be effective, you also need to block legacy authentication. Effective October 1, 2022, we will begin to permanently disable Basic Authentication for Exchange Online in all Microsoft 365 tenants regardless of usage, except for SMTP Authentication.

#Fusionfall legacy signin password#