diff --git a/packages/nylas-sync/syncback_tasks/move-to-folder.imap.js b/packages/nylas-sync/syncback_tasks/move-to-folder.imap.js
index 2dbd4a26e..0f7f83bd4 100644
--- a/packages/nylas-sync/syncback_tasks/move-to-folder.imap.js
+++ b/packages/nylas-sync/syncback_tasks/move-to-folder.imap.js
@@ -12,7 +12,7 @@ class MoveToFolderIMAP extends SyncbackTask {
 
     const eachMsg = ({message}) => {
       return db.Category.findById(toFolderId).then((category) => {
-        return imap.move(message.CategoryId, category.name)
+        return imap.move(message.categoryId, category.name)
       })
     }
 
diff --git a/packages/nylas-sync/syncback_tasks/task-helpers.js b/packages/nylas-sync/syncback_tasks/task-helpers.js
index f23ce5efd..bca3d85cf 100644
--- a/packages/nylas-sync/syncback_tasks/task-helpers.js
+++ b/packages/nylas-sync/syncback_tasks/task-helpers.js
@@ -4,8 +4,8 @@ const TaskHelpers = {
 
     return db.Thread.findById(threadId).then((thread) =>
       thread.getMessages().each((message) => {
-        if (!msgsInCategories[message.CategoryId]) {
-          msgsInCategories[message.CategoryId] = [message];
+        if (!msgsInCategories[message.categoryId]) {
+          msgsInCategories[message.categoryId] = [message];
         } else {
           msgsInCategories.push(message);
         }