diff --git a/types/office-js-preview/index.d.ts b/types/office-js-preview/index.d.ts
index 7b94243c31..aa29c3c25e 100644
--- a/types/office-js-preview/index.d.ts
+++ b/types/office-js-preview/index.d.ts
@@ -13663,21 +13663,6 @@ declare namespace Office {
          * </table>
          */
         body: Body;
-        /**
-         * Gets an object that provides methods for managing the item's categories.
-         *
-         * [Api set: Mailbox Preview]
-         *
-         * @remarks
-         *
-         * <table>
-         *   <tr><td>{@link https://docs.microsoft.com/outlook/add-ins/understanding-outlook-add-in-permissions | Minimum permission level}</td><td>ReadItem</td></tr>
-         *   <tr><td>{@link https://docs.microsoft.com/outlook/add-ins/#extension-points | Applicable Outlook mode}</td><td>Compose or Read</td></tr>
-         * </table>
-         * 
-         * @beta
-         */
-        categories: Categories;
         /**
          * Gets the type of item that an instance represents.
          *