This article describes how Microsoft Outlook locates and
downloads the offline address list or the offline address book from a Microsoft
Exchange 2000 computer or a Microsoft Exchange Server 5.5 computer. You can use
the procedures and information provided in this article to help you
troubleshoot situations where Outlook users cannot download the offline address
The offline address book that Outlook downloads depends on
whether the mailbox is homed on Exchange 2000 or Exchange Server 5.5. Exchange
2000 mailboxes download the offline address list for the mailbox store. By
default, the following offline address list is downloaded:
/o=Organization/cn=addrlists/cn=oabs/cn=Default Offline Address List
Exchange Server 5.5 mailboxes use the following EX-type offline
If you cannot download the offline address book in Outlook, you
may receive the following error message:
An error occurred
while opening the Microsoft Exchange offline address book files on the
Microsoft Exchange Server. See your administrator.
Unable to download
the Offline Address Book. The Microsoft Exchange Address Book could not be
Use the Mdbvu32.exe Tool to Locate the Offline Address Book
If you cannot download the offline address book in Outlook, use
the Mdbvu32.exe tool to locate the offline address book, and then troubleshoot
any download issues. To do so, follow these steps:
- Verify that you can access the replica of the offline
address book or offline address list for the mailbox.
- Use the Mdbvu32.exe tool to determine the
PR_ENTRYID value for the offline address book. To do so,
follow these steps:
- Insert the Exchange 2000 or Exchange Server CD-ROM into
the computer's CD-ROM or DVD-ROM drive.
- Start Windows Explorer, and then locate the
drive:\Server\Support\Utils\i386 folder, where
drive is the computer's CD-ROM or DVD-ROM
- Double-click Mdbvu32.exe.
- In the MAPILogonEX(MAPI_LOGON_UI)
dialog box , under Flags, click to select the
MAPI_NEW_SESSION check box, and then click
- In the Choose Profile dialog box,
click the appropriate profile, and then click OK.
- On the MDB menu, click
- In the Select Message Store To Open
dialog box, click Public Folders, and then click
- On the MDB menu, click MDB
- In the MDB Properties dialog box,
locate the 0x6626 entry. Make a note of the property data
value that is displayed next to it.
This property data value starts
with *pb: and is followed by a series of alphanumeric
characters .This value provides the PR_ENTRYID value for the
offline address book that Outlook downloads.
- Click Close.
- On the MDB menu, click Open
- In the Child Folders box, double-click
NON_IPM_SUBTREE, and then double-click OFFLINE ADDRESS
A list of offline address book folders is displayed in
the Child Folders box.
- Locate the offline address book folder that uses the
same PR_ENTRYID value that you noted in step 2i. To determine
the PR_ENTRYID value, double-click each offline address book
entry in the Child Folders box, locate the
PR_ENTRYID entry in the Folder Properties
box, and then compare the value that is displayed next to it with the value
that you noted in step 2i.
- After you identify the correct offline address book,
double-click OAB Version 2 in the Child
- Verify that you can see the messages in the OAB Version 2
If you cannot see the messages, the offline address book was
either not generated or not replicated to this copy of the folder.
- If you can see the messages in the OAB Version 2 folder,
locate the message where the PR_OAB_MESSAGE_CLASS (ptag 68030003)
property is set to 0x1. This is the message that
Outlook tries to download.
Troubleshoot Download Issues
The 0x1 message is much larger than the other messages in OAB
Version2 folder. The message size can be a problem in some environments. For
example, if the Internet Mail Service is used to connect two sites, any size
restrictions that are configured on the connector can prevent replication of
the 0x1 message. To resolve this issue, use one of the following methods, as
appropriate to your situation:
- Remove the replicas of the offline address book in Exchange
2000, generate an offline address book for each site, and then point the
mailbox stores to the offline address book in the local site.
- Remove the message size restrictions that are configured on
the Internet Mail Service. Restrictions on message sizes do not affect system
messages on the message transfer agent (MTA) or X.400 Connectors. However,
limits that are set on external connectors, such as the Internet Mail Service,
apply to all messages including replication messages and can disrupt
Outlook users may not be able to download the offline address
book if the PR_ADDRBOOK_FOR_LOCAL_SITE_ENTRYID
property is not
updated to use the latest value. This can occur after you use the Guidgen.exe
tool to generate globally unique identifiers (GUID) for site folders. To
resolve this issue, restart the information store service.
For additional information about how to
troubleshoot the Exchange 2000 offline address list, click the following
article number to view the article in the Microsoft Knowledge Base:
XADM: Troubleshooting the Exchange
2000 offline address list
Article ID: 811870 - Last Review: February 27, 2007 - Revision: 2.7
- Microsoft Exchange 2000 Server Standard Edition
- Microsoft Exchange Server 5.5 Standard Edition