diff --git a/Sources/Core/AWSClientRuntime/Sources/AWSClientRuntime/Endpoints/EndpointResolverMiddleware.swift b/Sources/Core/AWSClientRuntime/Sources/AWSClientRuntime/Endpoints/EndpointResolverMiddleware.swift
index 670374d8d6f..067c3ef0b16 100644
--- a/Sources/Core/AWSClientRuntime/Sources/AWSClientRuntime/Endpoints/EndpointResolverMiddleware.swift
+++ b/Sources/Core/AWSClientRuntime/Sources/AWSClientRuntime/Endpoints/EndpointResolverMiddleware.swift
@@ -80,20 +80,6 @@ extension EndpointResolverMiddleware: ApplyEndpoint {
             builder.withProtocol(protocolType)
         }
 
-        if let signingName = signingName {
-            attributes.signingName = signingName
-            attributes.selectedAuthScheme = selectedAuthScheme?.getCopyWithUpdatedSigningProperty(
-                key: SigningPropertyKeys.signingName, value: signingName
-            )
-        }
-
-        if let signingRegion = signingRegion {
-            attributes.signingRegion = signingRegion
-            attributes.selectedAuthScheme = selectedAuthScheme?.getCopyWithUpdatedSigningProperty(
-                key: SigningPropertyKeys.signingRegion, value: signingRegion
-            )
-        }
-
         if let signingAlgorithm = signingAlgorithm {
             attributes.signingAlgorithm = SigningAlgorithm(rawValue: signingAlgorithm)
         }
diff --git a/Sources/Core/AWSSDKHTTPAuth/Sources/AWSSDKHTTPAuth/SigV4AAuthScheme.swift b/Sources/Core/AWSSDKHTTPAuth/Sources/AWSSDKHTTPAuth/SigV4AAuthScheme.swift
index d92486cf6e3..194f95c6a62 100644
--- a/Sources/Core/AWSSDKHTTPAuth/Sources/AWSSDKHTTPAuth/SigV4AAuthScheme.swift
+++ b/Sources/Core/AWSSDKHTTPAuth/Sources/AWSSDKHTTPAuth/SigV4AAuthScheme.swift
@@ -32,7 +32,10 @@ public struct SigV4AAuthScheme: AuthScheme {
 
         // Set signing name and signing region flags
         updatedSigningProperties.set(key: SigningPropertyKeys.signingName, value: context.signingName)
-        updatedSigningProperties.set(key: SigningPropertyKeys.signingRegion, value: context.signingRegion)
+        updatedSigningProperties.set(
+            key: SigningPropertyKeys.signingRegion,
+            value: signingProperties.get(key: SigningPropertyKeys.signingRegion) ?? context.signingRegion
+        )
 
         // Set expiration flag
         //
diff --git a/Sources/Core/AWSSDKHTTPAuth/Sources/AWSSDKHTTPAuth/SigV4AuthScheme.swift b/Sources/Core/AWSSDKHTTPAuth/Sources/AWSSDKHTTPAuth/SigV4AuthScheme.swift
index a7e46087c2d..79d8ea06487 100644
--- a/Sources/Core/AWSSDKHTTPAuth/Sources/AWSSDKHTTPAuth/SigV4AuthScheme.swift
+++ b/Sources/Core/AWSSDKHTTPAuth/Sources/AWSSDKHTTPAuth/SigV4AuthScheme.swift
@@ -39,7 +39,10 @@ public struct SigV4AuthScheme: AuthScheme {
 
         // Set signing name and signing region flags
         updatedSigningProperties.set(key: SigningPropertyKeys.signingName, value: context.signingName)
-        updatedSigningProperties.set(key: SigningPropertyKeys.signingRegion, value: context.signingRegion)
+        updatedSigningProperties.set(
+            key: SigningPropertyKeys.signingRegion,
+            value: signingProperties.get(key: SigningPropertyKeys.signingRegion) ?? context.signingRegion
+        )
 
         // Set expiration flag
         //