What causes the issue?

This issue is caused by installing one of the following updates that have been pushed out by

Microsoft on 11/12/13:

KB2837618 or KB2837643

If you have not already done so, please avoid this update for a bit until Microsoft corrects the issue.

If you cannot avoid the update, we will provide you with further steps regarding a temporary fix for

the issue.

What does this issue affect?

This issue with Microsoft Outlook 2013 and Office 365 will cause IMAP folders to not successfully

synchronize, therefore inhibit your ability to receive new mail to your inbox.

How do I fix this issue?

There are a few ways to resolve the issue:

Uninstall the recent updates (KB2837618 or KB2837643)

One option is to remove the recent update that has been pushed out by Microsoft to

Outlook 2013 and Office 365 users. To do so, complete the following steps:

1. Open your Start menu and click visit your Control Panel.

2. Click Programs and Features

3. Click View Installed Updates

4. Locate either the KB2837618 or KB2837643 updates and remove them.

Disable the "Show only subscribed folders" option in Outlook

There have been reports that the problem can also be resolved by removing the setting

that states to show only subscribed folders in Outlook. To do so, complete the following

steps:

1. Right-click the name of your account with the issue, then click the IMAP

Folders... link.

2. Outlook will open a box with IMAP folders.There is a checkbox that says, "When

displaying hierarchy in Outlook, show only the subscribed folders."Uncheck that box.

3. Force sending/receiving within Outlook and everything should synchronize up properly.

Changing the root folder path

Visit your Account Settings, then Advanced for the mail account that you are having

trouble with. This can be located at one of the following:

Go to Change Account>More Settings>Advanced Tab

File>Account Settings>Account settings>Change...>More Settings...>Advanced

1. In the Folders option, look for "Root folder path" and enter "INBOX" (with all caps).

2. Save your settings and force a Send/Receive

We will keep this article updated as much as possible while the issue persists. If you

have any further fixes that worked for you, let us know in the comments.