This feature requires you to use a Microsoft Exchange Server 2003, Exchange Server 2007, or Exchange Server 2010, and a Microsoft SharePoint account. For more information about Microsoft Exchange accounts and how to determine which version of Exchange your account connects to, see the links in the See Also section.
Important: The ability to set synchronization on individual folders is not available in Outlook 2016 and 2013. To solve sync problems with specific email providers, search using the keywords "sync" and the provider (GMail, Outlook.com, or Yahoo mail) name.
Setting synchronization on folders in Outlook 2010 and 2007
The synchronization issues folders contain logs and items that Microsoft Outlook has been unable to synchronize with your Exchange Server or SharePoint server. There are four synchronization issues folders that appear in the Navigation Pane when you view the Folder List.
On the Go menu, click Folder List.
The following describes the four folders and the items you may find in each folder:
Sync Issues Contains all of the synchronization logs. This folder is helpful if Outlook is having trouble synchronizing — for example, there is an item that you see in Outlook Web Access, but not in Outlook — or you are not getting new mail in some folders when using Cached Exchange Mode.
The information in this folder may help your organization's support team or Exchange server administrator determine what is wrong. The contents of the Sync Issues folder are not copied to your server, and you cannot view the items in the Sync Issues folder from any other computer.
Conflicts Contains all the multiple copies of conflicting items in your mailbox. An InfoBar at the top of the original item advises you that a conflict for this item exists. The conflicting item is stored in the Conflicts folder. Clicking the InfoBar will bring up a list of conflicting items and allow you to resolve the conflict by determining which item you want to keep.
If you have made changes to an item, but are not seeing the updated item in your Navigation Pane folders, check for an InfoBar notice at the top of the item. If you cannot find the original item, check the Conflicts folder. It is possible that your changes caused a conflict with the original item, and the changes will exist in the Conflicts folder.
Local Failures Contains all items that could not be sent to your server. If you have made changes to items while working offline, and then notice that your changes are not appearing in another Outlook client, Outlook Web Access, or your SharePoint list, you should check this folder.
The local changes may be permanently stuck in your Local Failures folder. An InfoBar appears at the top of any item that has another copy of the item stored in the Local Failures folder. Clicking the InfoBar opens the Local Failures folder for you in a separate window. You can only see these items when you are offline or using Cached Exchange Mode and you cannot view them from any other computer.
When you are synchronizing Outlook with a SharePoint list you might see an error similar to one of the following errors when an item cannot be synchronized up to the server.
One or more items failed to copy. Changes that were made to their attachments are not compatible with the server. The failed items were moved to your Local Failures folder and replaced with copies from the server.
Failed to copy one or more items because some are not compatible with SharePoint. The failed items were moved to your Local Failures folder and replaced with copies from the server.
Cannot assign the task <task name> because SharePoint does not recognize one or more of the users that the task was assigned to. The task was moved to your Local Failures folder. Either modify the task to be assigned to a valid user or contact your site administrator to expand the site’s member's list.
These errors can occur when Outlook attempts to synchronize a Contact Group (PDL) to a SharePoint list. SharePoint does not support Outlook Contact Groups. To work around this limitation, you can add individual contacts from within the group to the SharePoint list.
If the error is for a task, the SharePoint task may be assigned to a SharePoint contact that does not have an email address. To resolve this issue, edit the assigned SharePoint contact to include an email address. Alternatively, you can assign the SharePoint task to a different SharePoint contact that already has an associated email address.
Server Failures Contains items that Outlook failed to synchronize from your Exchange mailbox or SharePoint server. When Outlook cannot synchronize the item from the server, it moves it from its original folder location into the Server Failures folder. The contents of this folder are available only when you have a connection to your server.
If you are missing a message that has been sent to you, and you have verified with the sender that the message was sent, check this folder. Items normally appear in this folder only when there are failures in synchronizing server items with an Offline Folder file (.ost), which is used when you work offline or use Cached Exchange Mode. An InfoBar appears at the top of any item that has another copy of the item stored in the Server Failures folder. Clicking the InfoBar will open the Server Failures folder for you in a separate window.
Note: If you use the Offline Folder file (.ost) Integrity Check tool (Scanost.exe) to fix synchronization errors, the scan logs that are generated can be found in Deleted Items.