Microsoft is Disabling Legacy Authentication in October 2022

iVision is here to support your business as Microsoft shifts from Legacy authentication to Modern authentication. Please input your info below and we’ll reach out with next steps to strengthen your application security.

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Who? 

Anyone with existing presence in Microsoft 365. Any automation, email-based alerting that uses your Exchange Online tenant, or user-facing applications like mobile email clients could be affected.  

What? 

Microsoft is disabling Legacy authentication in Exchange Online for Exchange ActiveSync (EAS), POP, IMAP, Remote PowerShell, Exchange Web Services (EWS), Offline Address Book (OAB), Outlook for Windows and Mac. All these authentication methods will transition to Modern authentication, which essentially means instead of sending both your username and password to an application, your information will be redirected to an identity provider for authentication. This enables multi-factor authentication, and services like Windows Hello for Business to be enforced. Allowing Basic authentication in your Microsoft 365 tenant can mean attackers can bypass MFA policies in some cases. 

This change may disrupt end user email productivity or break applications that connect to Exchange Online services if legacy authentication is still in use.

When? 

While Legacy authentication has already deactivated for new Microsoft 365 tenants, the official switch for existing users will be effective on October 1, 2022.  

Why? 

As more effective user authentication alternatives have been developed, Legacy authentication has become outdated. This transition will strengthen your application security and help protect your environment from threats. 

How can iVision help? 

As a longtime Microsoft partner, we understand the intricacies of their platform, and our team is up to date on all the best practices necessary to prepare your business for a successful shift. We’ll develop a remediation plan and guide you through updating software, reconfiguring apps, updating scripts and developing communication plans for your end users customized for your business needs.