XCLN: Opening Additional Mailboxes When Starting Outlook Does Not Work When DPA is Used as Authentication Method

ID: Q226350

The information in this article applies to:

Microsoft Exchange Server, version 5.5

SYMPTOMS

When Outlook is configured to open additional mailboxes on startup, it does not work if Distributed Password Authentication (DPA) is used as authentication method, and you get the following error message:

Unable to expand the folder. The set of folders could not be opened. The information store could not be opened.

The above problem does not occur when Windows NT LAN Manager (NTLM) is used as authentication method.

CAUSE

This behavior is caused by a logic error in the code. The main difference between Windows NT and Membership security is that with Membership, one Windows NT account, the "broker," is mapped to all the Exchange Server mailboxes.

RESOLUTION

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, please see the following article in the Microsoft Knowledge Base:

Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:

Component: MDB

File Name	Version
Emsmdb32.dll	5.5.2585.0

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.

Additional query words:

Keywords : exc55 EXC55SP3Fix
Version : winnt:5.5
Platform : winnt
Issue type : kbbug