diff --git a/specification/mixedreality/resource-manager/Microsoft.MixedReality/stable/2021-01-01/proxy.json b/specification/mixedreality/resource-manager/Microsoft.MixedReality/stable/2021-01-01/proxy.json
index 20c3d166b337..2e4678d05298 100644
--- a/specification/mixedreality/resource-manager/Microsoft.MixedReality/stable/2021-01-01/proxy.json
+++ b/specification/mixedreality/resource-manager/Microsoft.MixedReality/stable/2021-01-01/proxy.json
@@ -335,6 +335,10 @@
         "internalName": {
           "description": "Internal name of the dimension.",
           "type": "string"
+        },
+        "toBeExportedForShoebox": {
+          "description": "Whether the dimension should be included for the shoebox export scenario.",
+          "type": "boolean"
         }
       }
     },