diff --git a/types/office-js-preview/index.d.ts b/types/office-js-preview/index.d.ts
index 299a43893a..a47d120ab4 100644
--- a/types/office-js-preview/index.d.ts
+++ b/types/office-js-preview/index.d.ts
@@ -458,10 +458,6 @@ declare namespace Office {
         */
         error: Office.Error;
         /**
-        * Gets the the GUID of the CustomXmlPart, when T (the type of the value property) is {@link Office.CustomXmlPart}.
-        */
-        id?: string;
-        /**
         * Gets the {@link Office.AsyncResultStatus} of the asynchronous operation.
         */
         status: AsyncResultStatus;
diff --git a/types/office-js/index.d.ts b/types/office-js/index.d.ts
index 5cc635f947..00fb93ab93 100644
--- a/types/office-js/index.d.ts
+++ b/types/office-js/index.d.ts
@@ -458,10 +458,6 @@ declare namespace Office {
         */
         error: Office.Error;
         /**
-        * Gets the the GUID of the CustomXmlPart, when T (the type of the value property) is {@link Office.CustomXmlPart}.
-        */
-        id?: string;
-        /**
         * Gets the {@link Office.AsyncResultStatus} of the asynchronous operation.
         */
         status: AsyncResultStatus;