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<Attribute xmlns="urn:oasis:names:tc:SAML:2.0:assertion" Name="http://schemas.microsoft.com/ws/2008/06/identity/claims/windowsaccountname%22windowsaccountname” NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri" FriendlyName="Windows account name"/>
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A similar guide for MS Azure is available from SSO (Single Sign On) Guide for Microsoft Azure