Error when you use an IMAP4 client or a POP3 client to log on to a delegate mailbox of Exchange Server 2007: "800cccd1"

You can use an IMAP4 client or a POP3 client in following format to log on to a delegate mailbox that is hosted on a version of Exchange Server that is earlier than Microsoft Exchange Server 2007: However, this functionality is not supported in Exchange Server 2007. When you use an IMAP4 client or a POP3 client to log on to a delegate mailbox of Exchange Server 2007 in the previous format, you receive an error that resembles the following:

To resolve this problem, download Update Rollup 4 for Exchange Server 2007 Service Pack 1. Then, install the update on the Exchange server. For more information about how to download Update Rollup 4 for Exchange Server 2007 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.