"Folder save operation failed due to invalid property values" error message in Outlook for Mac 2011


Symptoms


In Microsoft Outlook for Mac 2011, you receive the following error message:

Error: Could not synchronize record: Sync Issues to Exchange server: <Account name>
Details: The folder save operation failed due to invalid property values
Error code: -19918
Note In this error message, the folder name may vary. Therefore, the first line of this message may also be one of the following:

Could not synchronize record: Conversation History to Exchange server: <Account name>

Could not synchronize record: RSS Feeds to Exchange server: <Account name>

Could not synchronize record: Local Failures to Exchange server: <Account name>

Could not synchronize record: Server Failures to Exchange server: <Account name>

Cause


This problem occurs because one or more default folder in Outlook for Mac 2011 were moved or deleted. These folders include Conversation History, RSS Feeds, Sync Issues, Local Failures, and Server Failures.

You cannot move or delete these default folders in Outlook for Mac.

Resolution


To restore these folders and resolve the errors, follow these steps:
  1. On the Outlook menu, click Preferences.
  2. Under General, deselect the following options:
    • Group similar folders, such as Inboxes, from different accounts
    • Hide On My Computer folders
  3. Right-click the top level folder, and then select Folder Properties.

    Note This folder has the same name as your Exchange account.
  4. Click Empty.
After you follow these steps, the folders that were moved or deleted will be restored to their default locations.