From 6014e425e7c32d802752a934a2b1db43dbf1f021 Mon Sep 17 00:00:00 2001
From: Patrick Rodgers <patrick.rodgers@microsoft.com>
Date: Tue, 10 May 2022 13:11:41 -0400
Subject: [PATCH] fixing additional headers mapping in sendEmail #2253

---
 packages/sp/sputilities/types.ts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/packages/sp/sputilities/types.ts b/packages/sp/sputilities/types.ts
index 9fafbec4c..a524d75da 100644
--- a/packages/sp/sputilities/types.ts
+++ b/packages/sp/sputilities/types.ts
@@ -17,6 +17,17 @@ export class _Utilities extends _SPQueryable implements IUtilities {
     }
 
     public sendEmail(properties: IEmailProperties): Promise<void> {
+
+        if (properties.AdditionalHeaders) {
+
+            // we have to remap the additional headers into this format #2253
+            properties.AdditionalHeaders = <any>Reflect.ownKeys(properties.AdditionalHeaders).map(key => ({
+                Key: key,
+                Value: Reflect.get(properties.AdditionalHeaders, key),
+                ValueType: "Edm.String",
+            }));
+        }
+
         return UtilitiesCloneFactory(this, "SendEmail").excute<void>({ properties });
     }