diff --git a/projects/adf-office-services-ext/src/lib/utils.ts b/projects/adf-office-services-ext/src/lib/utils.ts
index c359e6efb..a5c6fe4af 100644
--- a/projects/adf-office-services-ext/src/lib/utils.ts
+++ b/projects/adf-office-services-ext/src/lib/utils.ts
@@ -38,6 +38,7 @@ export const supportedExtensions = {
   xlt: 'ms-excel',
   xltx: 'ms-excel',
   xltm: 'ms-excel',
+  xlam: 'ms-excel',
   ppt: 'ms-powerpoint',
   pptx: 'ms-powerpoint',
   pot: 'ms-powerpoint',