# Are GCC High Tenants supported?

At present we are not able to support GCC High Tenants due to the deprecation of [ApplicationImpersonation](https://techcommunity.microsoft.com/blog/exchange/retirement-of-rbac-application-impersonation-in-exchange-online/4062671) and [Basic Authentication](https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online)

This means that we cannot currently support GCC High Tenants connections via [Enterprise Connect](https://docs.cronofy.com/developers/authorization/enterprise-connect/index.md) or [Individual Connect](https://docs.cronofy.com/developers/authorization/individual-connect/index.md).



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