Used for level 4 exchange online configurations, requires SSKY Suite 2.1+

https://server/config/General-Settings/Advanced

GCCH:
Key: graphauthendpoint Value: https://login.microsoftonline.us
Key: graphapiendpoint Value: https://graph.microsoft.us

www.office365.us

outlook.office365.us

https://graph.microsoft.us

https://login.microsoftonline.us

DoD:

https://portal.azure.us

https://dod-graph.microsoft.us

https://login.microsoftonline.us

https://outlook-dod.office365.us

References:

https://learn.microsoft.com/en-us/graph/deployments

https://learn.microsoft.com/en-us/microsoft-365/enterprise/microsoft-365-u-s-government-dod-endpoints?view=o365-worldwide

https://learn.microsoft.com/en-us/azure/active-directory/develop/authentication-national-cloud