diff --git a/aws-auth-cognito/src/main/java/com/amplifyframework/auth/cognito/AuthConfiguration.kt b/aws-auth-cognito/src/main/java/com/amplifyframework/auth/cognito/AuthConfiguration.kt
index e70216fc4..d52badb07 100644
--- a/aws-auth-cognito/src/main/java/com/amplifyframework/auth/cognito/AuthConfiguration.kt
+++ b/aws-auth-cognito/src/main/java/com/amplifyframework/auth/cognito/AuthConfiguration.kt
@@ -151,8 +151,7 @@ data class AuthConfiguration internal constructor(
                 OauthConfiguration(
                     appClient = auth.userPoolClientId,
                     appSecret = null, // Not supported in Gen2
-                    // Use the custom domain if specified, otherwise use the generated cognito domain
-                    domain = it.customDomain ?: it.cognitoDomain,
+                    domain = it.domain,
                     scopes = it.scopes.toSet(),
                     // Note: Gen2 config gives an array for these values, while Gen1 is just a String. In Gen1
                     // if you specify multiple URIs the CLI will join them to a comma-delimited string in the json.
diff --git a/aws-auth-cognito/src/test/java/com/amplifyframework/auth/cognito/AuthConfigurationTest.kt b/aws-auth-cognito/src/test/java/com/amplifyframework/auth/cognito/AuthConfigurationTest.kt
index cb97711b9..915e7af2b 100644
--- a/aws-auth-cognito/src/test/java/com/amplifyframework/auth/cognito/AuthConfigurationTest.kt
+++ b/aws-auth-cognito/src/test/java/com/amplifyframework/auth/cognito/AuthConfigurationTest.kt
@@ -185,7 +185,7 @@ class AuthConfigurationTest {
                     requireSymbols = true
                 }
                 oauth {
-                    cognitoDomain = "https://test.com"
+                    domain = "https://test.com"
                     identityProviders += AmplifyOutputsData.Auth.Oauth.IdentityProviders.GOOGLE
                     scopes += listOf("myScope", "myScope2")
                     redirectSignInUri += "https://test.com/signin"
@@ -259,22 +259,6 @@ class AuthConfigurationTest {
         configuration.identityPool.shouldBeNull()
     }
 
-    @Test
-    fun `uses custom oauth domain if specified`() {
-        val data = amplifyOutputsData {
-            auth {
-                oauth {
-                    cognitoDomain = "cognito"
-                    customDomain = "custom"
-                }
-            }
-        }
-
-        val configuration = AuthConfiguration.from(data)
-
-        configuration.oauth?.domain shouldBe "custom"
-    }
-
     @Test
     fun `throws exception if auth is not configured in amplify outputs`() {
         val data = amplifyOutputsData {
diff --git a/core/src/main/java/com/amplifyframework/core/configuration/AmplifyOutputsData.kt b/core/src/main/java/com/amplifyframework/core/configuration/AmplifyOutputsData.kt
index 630a51034..0dae51b79 100644
--- a/core/src/main/java/com/amplifyframework/core/configuration/AmplifyOutputsData.kt
+++ b/core/src/main/java/com/amplifyframework/core/configuration/AmplifyOutputsData.kt
@@ -89,8 +89,7 @@ interface AmplifyOutputsData {
         @InternalAmplifyApi
         interface Oauth {
             val identityProviders: List<IdentityProviders>
-            val cognitoDomain: String
-            val customDomain: String?
+            val domain: String
             val scopes: List<String>
             val redirectSignInUri: List<String>
             val redirectSignOutUri: List<String>
@@ -301,8 +300,7 @@ internal data class AmplifyOutputsDataImpl(
         @Serializable
         data class Oauth(
             override val identityProviders: List<IdentityProviders>,
-            override val cognitoDomain: String,
-            override val customDomain: String?,
+            override val domain: String,
             override val scopes: List<String>,
             override val redirectSignInUri: List<String>,
             override val redirectSignOutUri: List<String>,
diff --git a/testutils/src/main/java/com/amplifyframework/testutils/configuration/AmplifyOutputsDataBuilder.kt b/testutils/src/main/java/com/amplifyframework/testutils/configuration/AmplifyOutputsDataBuilder.kt
index 9dfef712f..eada856d3 100644
--- a/testutils/src/main/java/com/amplifyframework/testutils/configuration/AmplifyOutputsDataBuilder.kt
+++ b/testutils/src/main/java/com/amplifyframework/testutils/configuration/AmplifyOutputsDataBuilder.kt
@@ -103,8 +103,7 @@ class PasswordPolicyBuilder : AmplifyOutputsData.Auth.PasswordPolicy {
 
 class OauthBuilder : AmplifyOutputsData.Auth.Oauth {
     override val identityProviders: MutableList<AmplifyOutputsData.Auth.Oauth.IdentityProviders> = mutableListOf()
-    override var cognitoDomain: String = "domain"
-    override var customDomain: String? = null
+    override var domain: String = "domain"
     override val scopes: MutableList<String> = mutableListOf()
     override val redirectSignInUri: MutableList<String> = mutableListOf()
     override val redirectSignOutUri: MutableList<String> = mutableListOf()