diff --git a/website/docs/d/active_directory_domain_service.html.markdown b/website/docs/d/active_directory_domain_service.html.markdown
index 4b8b9714d958..c4c63a08f8b6 100644
--- a/website/docs/d/active_directory_domain_service.html.markdown
+++ b/website/docs/d/active_directory_domain_service.html.markdown
@@ -10,6 +10,8 @@ description: |-
 
 Gets information about an Active Directory Domain Service.
 
+-> **Supported Modes:** At present this data source only supports **User Forest** mode and _not_ **Resource Forest** mode. [Read more](https://docs.microsoft.com/en-us/azure/active-directory-domain-services/concepts-resource-forest) about the different operation modes for this service.
+
 ## Example Usage
 
 ```hcl
diff --git a/website/docs/r/active_directory_domain_service.html.markdown b/website/docs/r/active_directory_domain_service.html.markdown
index 8a9abfc4b880..b23806fe52ff 100644
--- a/website/docs/r/active_directory_domain_service.html.markdown
+++ b/website/docs/r/active_directory_domain_service.html.markdown
@@ -10,7 +10,9 @@ description: |-
 
 Manages an Active Directory Domain Service.
 
-~> Implementation Note: Before using this resource, there must exist in your tenant a service principal for the Domain Services published application. This service principal cannot be easily managed by Terraform and it's recommended to create this manually, as it does not exist by default. See [official documentation](https://docs.microsoft.com/en-us/azure/active-directory-domain-services/powershell-create-instance#create-required-azure-ad-resources) for details.
+~> **Implementation Note:** Before using this resource, there must exist in your tenant a service principal for the Domain Services published application. This service principal cannot be easily managed by Terraform and it's recommended to create this manually, as it does not exist by default. See [official documentation](https://docs.microsoft.com/en-us/azure/active-directory-domain-services/powershell-create-instance#create-required-azure-ad-resources) for details.
+
+-> **Supported Modes:** At present this resource only supports **User Forest** mode and _not_ **Resource Forest** mode. [Read more](https://docs.microsoft.com/en-us/azure/active-directory-domain-services/concepts-resource-forest) about the different operation modes for this service.
 
 ## Example Usage