diff --git a/internal/services/orbital/contact_profile_resource.go b/internal/services/orbital/contact_profile_resource.go
index f5d94a097026..2e45ca281dc5 100644
--- a/internal/services/orbital/contact_profile_resource.go
+++ b/internal/services/orbital/contact_profile_resource.go
@@ -136,9 +136,15 @@ func (r ContactProfileResource) Create() sdk.ResourceFunc {
 				SubnetId: model.NetworkConfigurationSubnetId,
 			}
 
+			// The service only accept `null` or non-empty value, empty string will cause a 400 response
+			var eventHubUri *string
+			if model.EventHubUri != "" {
+				eventHubUri = pointer.To(model.EventHubUri)
+			}
+
 			contactProfilesProperties := contactprofile.ContactProfilesProperties{
 				AutoTrackingConfiguration:    pointer.To(autoTrackingConfiguration),
-				EventHubUri:                  pointer.To(model.EventHubUri),
+				EventHubUri:                  eventHubUri,
 				Links:                        links,
 				MinimumElevationDegrees:      pointer.To(model.MinimumElevationDegrees),
 				MinimumViableContactDuration: pointer.To(model.MinimumVariableContactDuration),
@@ -260,12 +266,18 @@ func (r ContactProfileResource) Update() sdk.ResourceFunc {
 				SubnetId: state.NetworkConfigurationSubnetId,
 			}
 
+			// The service only accept `null` or non-empty value, empty string will cause a 400 response
+			var eventHubUri *string
+			if state.EventHubUri != "" {
+				eventHubUri = pointer.To(state.EventHubUri)
+			}
+
 			if metadata.ResourceData.HasChangesExcept("name", "resource_group_name") {
 				contactProfile := contactprofile.ContactProfile{
 					Location: state.Location,
 					Properties: contactprofile.ContactProfilesProperties{
 						AutoTrackingConfiguration:    pointer.To(autoTrackingConfiguration),
-						EventHubUri:                  pointer.To(state.EventHubUri),
+						EventHubUri:                  eventHubUri,
 						Links:                        contactProfileLinks,
 						MinimumElevationDegrees:      pointer.To(state.MinimumElevationDegrees),
 						MinimumViableContactDuration: pointer.To(state.MinimumVariableContactDuration),
diff --git a/internal/services/orbital/contact_profile_resource_test.go b/internal/services/orbital/contact_profile_resource_test.go
index 5c1f20249c7e..d06843396ae8 100644
--- a/internal/services/orbital/contact_profile_resource_test.go
+++ b/internal/services/orbital/contact_profile_resource_test.go
@@ -233,6 +233,16 @@ resource "azurerm_eventhub" "test" {
   message_retention   = 1
 }
 
+data "azuread_service_principal" "test" {
+  display_name = "Azure Orbital Resource Provider"
+}
+
+resource "azurerm_role_assignment" "test" {
+  scope                = azurerm_eventhub.test.id
+  role_definition_name = "Azure Event Hubs Data Sender"
+  principal_id         = data.azuread_service_principal.test.object_id
+}
+
 resource "azurerm_orbital_contact_profile" "test" {
   name                              = "testcontactprofile-%d"
   resource_group_name               = azurerm_resource_group.test.name
@@ -246,7 +256,7 @@ resource "azurerm_orbital_contact_profile" "test" {
       name                       = "channelname"
       bandwidth_mhz              = 100
       center_frequency_mhz       = 101
-      demodulation_configuration = "na"
+      demodulation_configuration = "aqua_direct_broadcast"
       modulation_configuration   = "AQUA_UPLINK_BPSK"
       end_point {
         end_point_name = "AQUA_command"
@@ -260,6 +270,8 @@ resource "azurerm_orbital_contact_profile" "test" {
     polarization = "RHCP"
   }
   network_configuration_subnet_id = azurerm_subnet.test.id
+
+  depends_on = [azurerm_role_assignment.test]
 }
 `, template, data.RandomInteger, data.RandomInteger, data.RandomInteger)
 }