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Office 365 legacy authentication10/10/2023 ![]() Modern authentication, on the other hand, is any protocol that supports multi-factor authentication (MFA). There are many other products like this still in common use, that either need firmware updates, software updates, or simply lack the ability to function without use of legacy auth. Organizations can update firmware to get more modern support, but there may be licensing concerns that limit the ability to have access to firmware updates. ![]() For example, older versions of Cisco Unified Communications systems offer email integration and contact list integration, with no option other than legacy auth. Systems that use legacy authentication often include document scanners, voicemail-to-email bridges, and other systems that integrate with email. Legacy authentication protocols include IMAP4, POP3, and EWS, EAS, and Remote PowerShell. Legacy and basic authentication rely solely on username and password, as opposed to additional forms of authentication. With Blumira’s new global report, “Microsoft 365: Legacy Authentication,” customers can quickly and easily detect instances of legacy authentication being used in their environments. Due to the changing business environment brought on by COVID-19, Microsoft delayed the retirement of legacy authentication protocols. ![]() This change was originally announced in 2019 and was planned to take place in 2020. Starting in October 2022, Microsoft will start deprecating legacy and basic authentication, even if it is still in use.
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