After you disable SAML SSO for your organization, all external identities for your organization will be removed. For more information, see "Viewing and managing a member's SAML access to your organization."
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In the upper-right corner of GitHub, select your profile photo, then click Your organizations.
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Next to the organization, click Settings.
Note: If you're unable to access the organization because your identity provider (IdP) is unavailable, you can use a recovery code to bypass SSO. For more information, see "Accessing your organization if your identity provider is unavailable."
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In the "Security" section of the sidebar, click Authentication security.
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Under "SAML single sign-on", deselect Enable SAML authentication.
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Click Save.