Article ID: 2494570 - View products that this article applies to.
When you expand a mailbox or public folder (except for the Inbox), Microsoft Outlook may display one of the following errors. Additionally, when you click the Address Book button on the toolbar, you may receive one of the following errors:
When one of these errors is displayed, outgoing mail may get stuck in the Outbox folder and is not sent until you restart Outlook.
This problem occurs when your Outlook messaging profile includes a Microsoft Exchange account that is configured to Use Cached Exchange Mode, and you have lots of cached public folders. Usually, this problem occurs when you exceed approximately 1,000 public folders, or a gigabyte of space is taken.
To prevent this problem, keep the number of cached public folders to fewer than 1,000. Or, reduce the number of folders until the error or errors stop occurring. If you are experiencing this problem, delete some public folder favorites by using the Outlook client. In some cases, if you have too many favorites, you may be unable to delete the folders because the error occurs when you click the public folder favorites folder.
To delete the public folder favorites, follow these steps: