Article ID: 198704
Article Last Modified on 10/28/2006
APPLIES TO
- Microsoft Exchange Server 5.0 Standard Edition
- Microsoft Exchange Server 5.5 Standard Edition
This article was previously published under Q198704
SYMPTOMS
When you try to log on to Microsoft Exchange Server with
Outlook Express by using Secure Password Authentication, you may see the
following error messages in Microsoft Outlook Express. Look in the
Details of the
Error tab after failing to connect.
* Unable to
logon to the server using Distributed Password Authentication.
Account:'Company POP3 Server Accnt.',
Server: 'server.company.com',
Protocol: POP3,
Server Response: '-ERR The AUTH protocol exchange was
canceled by the client.',Port: 110, Secure(SSL): NO, Server Error: 0x800ccc90,
Error Number: 0x800ccc18
On the Exchange Server computer
you will see the following Event IDs:
Application event
log error:
13005 MSExchange Pop3 Authentication
Logon attempt by
NTDomian\User from 157.57.148.24 to NtDomain/User has failed: EcGetMailboxDN()
call failed with error The requested mailbox is not available on this server.
11310 MSExchange Pop3 Authentication
The following error
occurred: The requested mailbox is not available on this
server.
CAUSE
Either the Outlook Express POP3 client is not able to
access the mailbox because it does not exist or there is a custom recipient in
the Exchange Server organization that has the same alias as you do, and
Exchange Server is attempting to access the custom recipient before accessing
your mailbox.
WORKAROUND
In Outlook Express, try using Clear Text, which is the
Log on using option under the
Servers tab of the mail account.
To do so:
- On the Tools menu, click Accounts. This will bring up several tabs.
- If you select any listed mail account, the properties will
have a Servers tab with the Log on using option.
- Select the Clear Text option.
If this works, then you were trying to access a non-existent
mailbox or the wrong mailbox. If this does not work, then the administrator
needs to check for and remove the custom recipient.
MORE INFORMATION
When a user tries to log on to Exchange Server with Outlook
Express and Secure Password Authentication, the client will pass the
credentials of the user logged on to the workstation. If the logon works using
the Clear Text option: <NT Domain/NT Account/Alias>, the user will have
to change his or her mailbox alias to the Windows NT account name in order to
use Secure Password Authentication. This is because Secure Password
Authentication will not pass the mailbox alias information. It defaults to
<NT DOMAIN\NTACCOUNT> and Exchange Server assumes the alias to be the
Windows NT account.
Keywords: kberrmsg kbfaq kbprb KB198704