You are currently offline, waiting for your internet to reconnect

Your browser is out-of-date

You need to update your browser to use the site.

Update to the latest version of Internet Explorer

You cannot log on to your mailbox and you receive an error in an Exchange server 2003 and an Exchange Server 2007 coexist environment

SYMPTOMS
Consider the following scenario:
  • There is a Microsoft Exchange server 2003 and Microsoft Exchange Server 2007 coexist environment.
  • You access an Exchange Server 2003 mailbox through an Exchange Server 2007 Client Access server (CAS) with the IMAP4 protocol.
  • You use the PLAIN authentication mechanism.
In this scenario, you cannot log on to the mailbox. Additionally, you receive the following error message:
"NO AUTHENTICATE failed"
CAUSE
When you use the PLAIN authentication mechanism, Exchange Server 2007 CAS passes the display name instead of the logon account name to the Exchange Server 2003 mailbox server. When this behavior occurs, authentication fails.
RESOLUTION
To fix this problem, apply the following update rollup:
972076 Description of Update Rollup 2 for Exchange Server 2007 Service Pack 2
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
For more information about the IMAP4 protocol and the PLAIN authentication mechanism, visit the following IETF Web sites:
Properties

Article ID: 975213 - Last Review: 01/22/2010 22:29:19 - Revision: 1.0

  • Microsoft Exchange Server 2007 Service Pack 2
  • kbhotfixrollup kbsurveynew kbexpertiseinter kbfix kbqfe KB975213
Feedback