This knowledge base solution explains how to connect to special types of tenants, for example GCC High. This is performed using "Office 365 User Provided Authentication (Not Auto Detected)" authentication, which is not displayed by default.
Follow the instructions provided in the attached guide "CM_UserProvidedAuthentication_User_Guide.docx" to configure "User Provided Authentication" in Content Matrix.
The authentication type ‘Office 365 User Provided Authentication (Not Auto Detected)’:
is hidden by default and will only be displayed after enabling the related configuration variable ‘(EnableUserProvidedAuthentication)’.
is only applicable for site level connections, and not for Office 365 tenant connections.