Policy
Allow Outlook Autodiscover to interact with Office Config Service
This policy setting determines whether Outlook can interact with the Office Config Service to get Autodiscover V2 service endpoint URL for different sovereigns. if you enable this policy setting, Outlook will get the URL for the sovereign Autodiscover v2 service endpoint by default. If you disable this policy setting, Outlook will get the URL for the WW Autodiscover v2 service endpoint by default.
76863b4b18e7 L_OutlookEnableOfficeConfigServiceInAutodiscover Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\outlook\autodiscover\enableoffice365configservice (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\outlook\autodiscover\enableoffice365configservice (disabled) = 0 Policy notes
This policy setting determines whether Outlook can interact with the Office Config Service to get Autodiscover V2 service endpoint URL for different sovereigns. if you enable this policy setting, Outlook will get the URL for the sovereign Autodiscover v2 service endpoint by default. If you disable this policy setting, Outlook will get the URL for the WW Autodiscover v2 service endpoint by default.