DOCUMENT:Q163589 20-FEB-2002 [exchange] TITLE :XCLN: Restoring from an OST after Deleting the Mailbox PRODUCT :Microsoft Exchange PROD/VER::4.0,5.0,8.0,8.01,8.02,8.03 OPER/SYS: KEYWORDS:kbusage ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Windows 3.x client, versions 4.0, 5.0 - Microsoft Exchange Windows NT client, versions 4.0, 5.0 - Microsoft Outlook 97, versions 8.0, 8.01, 8.02, 8.03 - Microsoft Outlook 98 - Microsoft Outlook 2000 ------------------------------------------------------------------------------- SUMMARY ======= Offline Folder files (OSTs) are considered slave replicas of the server- based folders. If you delete the master, the slave is orphaned. If the original Microsoft Exchange profile was not modified, you can still start the Microsoft Exchange client offline with the old OST and recover the data by moving the messages from the OST to a PST file. However, if the old profile was deleted or modified (by using it to log onto a different mailbox) then the data in the OST is lost. MORE INFORMATION ================ You can recover mail stored in an OST, provided that you have not tried to modify the profile that was used to create the OST file. If the profile used to create the OST file has been modified to point to a new mailbox, the information contained in the OST file may be lost. This is because security on an OST works so that Windows NT authentication cannot be used when you work offline. Therefore, you must "prove" that you're allowed to log onto the server-based master before the OST file gives you local access. To do this, Exchange Server creates an encrypted "cookie" from your mailbox's unique entry ID while you are successfully logged into the Exchange Server computer. This cookie is securely stored in your Exchange Server profile. Essentially, your profile stores this key for the OST. Every time you try to access the OST file it checks your profile for the existence of this key. If you modify the profile or try to connect to a new mailbox or new server with the current profile, Microsoft Exchange replaces this key with a new value from the mailbox that was created. At this point, you cannot access the data that was contained in the OST created against the first mailbox. For more information, see the Microsoft Exchange Disaster Recovery Document on Microsoft TechNet or on the Internet at: http://www.microsoft.com/exchange/techinfo/administration/55/BackupRestore.asp Steps to Recover ---------------- If you have not modified your profile or attempted to log on to the new mailbox, use the following steps to copy the offline messages to a PST: 1. Start the Exchange Client OFFLINE. 2. On the Tools menu, click Services. 3. Click Add. 4. Add a Personal Folders (PST) service. 5. Select the messages that you want to copy. 6. On the File menu, click Copy. 7. In the Copy to dialog box, select the personal folders (PST) that you created in step 4. 8. Click OK. 9. Repeat steps 5 through 8 for each folder that contains messages. At this point, the messages are copied to a PST. You can create a new profile and you can log on to the new server-based mailbox. After you complete this successfully, you can add a Personal Folders service (by referencing the PST created above), and you can copy the messages from the PST back to the server-based mailbox. NOTE: offline folders (OSTs) should not be considered as backups of your server based store. For more information on proper server backups, refer to the Microsoft Exchange Server Administrator's Guide, Chapter 15. Additional query words: exclnfaq 8.5 ====================================================================== Keywords : kbusage Technology : kbOutlookSearch kbExchangeSearch kbExchange500 kbExchange400 kbExchangeClientSearch kbOutlook97 kbZNotKeyword2 kbOutlook2000Search kbOutlook97Search kbOutlook98Search kbZNotKeyword3 kbOutlook801 kbOutlook802 kbOutlook803 kbExchange400NT kbExchange500NT Version : :4.0,5.0,8.0,8.01,8.02,8.03 Issue type : kbhowto ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.