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Exchange Server TechCenter > Exchange Server Forums > Clients > outlook 2007. event id : 27, oab download failed. synchronization log download successful.

Answered outlook 2007. event id : 27, oab download failed. synchronization log download successful.

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      Friday, March 26, 2010 9:12 PM
       
       
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      hello.  i've seen a lot of posts about OAB download failing, but none match my problem.

      i have outlook 2007 as client.  and first exchange 2007 sp1 on domain, on a windows 2008 machine.

       

      on the client, when i click send/receive, it takes ~10min to "copying offline address book template file".  then an event id 27 gets generated with "OAB download failed".

       

      Event Type:    Warning
      Event Source:    Outlook
      Event Category:    None
      Event ID:    27
      Date:        26/03/2010
      Time:        4:57:31 PM
      User:        N/A
      Computer:    computer
      Description:
      OAB Download Failed. (Result code in event data).

      For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
      Data:
      0000: 01 00 00 00 12 01 04 80   .......€
      0008: 01 00 00 00 01 00 00 00   ........
      0010: 01 00 00 00 00 00 00 00   ........
      0018: 00 00 00 00 00 00 00 00   ........
      0020: e9 fd 00 00 00 00 00 00   éý......
      0028: 00 00 00 00 44 37 00 00   ....D7..
      0030: 20 23 00 00 b4 30 00 00    #..´0..
      0038: 60 35 00 00 8c 33 00 00   `5..Œ3..
      0040: b0 8e 1a 02 01 00 00 00   °Ž......
      0048: 00 00 00 00 5c 00 00 00   ....\...
      0050: 00 00 00 00 04 00 00 00   ........
      0058: 00 00 00 00 00 00 00 00   ........
      0060: 00 00 00 00 00 00 00 00   ........
      0068: 00 00 00 00 00 00 00 00   ........
      0070: 00 00 00 00 00 00 00 00   ........
      0078: 00 00 00 00 00 00 00 00   ........
      0080: 00 00 00 00 00 00 00 00   ........
      0088: 00 00 00 00 00 00 00 00   ........
      0090: 00 00 00 00 00 00 00 00   ........
      0098: 00 00 00 00 00 00 00 00   ........
      00a0: 00 00 00 00 00 00 00 00   ........
      00a8: 00 00 00 00 00 00 00 00   ........
      00b0: 00 00 00 00 00 00 00 00   ........
      00b8: 00 00 00 00 00 00 00 00   ........
      00c0: 00 00 00 00 00 00 00 00   ........
      00c8: 00 00 00 00 00 00 00 00   ........
      00d0: 00 00 00 00 00 00 00 00   ........
      00d8: 00 00 00 00 00 00 00 00   ........

       

      from what i have seen, exchange server guid starts at offset 00b8, and outlook guid starts at 00e0.  but as you can see... there's nothing at 00b8 and 00e0 doesn't even show up.

       

      if i check my outlook sync folder, there are synchronization logs but none of them mention that the OAB failed.  in fact, it claims that it is successfull:

       

      16:53:47 Synchronizer Version 12.0.6509

      16:53:47 Synchronizing Mailbox 'user'

      16:53:47 Synchronizing Hierarchy

      16:53:48 Done

      16:57:31 Microsoft Exchange offline address book

      16:57:31 Download successful

       

       

      Test email-autoconfiguration shows that the OAB URL is pointed at the right place and succeeds.  i'm able to visit http://server/autodiscover/autodiscover.xml

       

      i'm also able to visit http://server/oab/guid/oab.xml

       

      has anyone encountered something and has a fix?

       

    Answers

    • Monday, March 29, 2010 9:12 AM
       
       Answered
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      Hello,

      first thing I would check is to verify if the OAB really downloaded or not ( I say thi sbecause it seems that you have some contradictory information reported)

      SO , create a new test user in your Domain, force a generation of the OAB on the mailbox server from the console ( or run update-offlineaddressbook). Then force the File Distribution service on the CAS to copy over the new oab file (update-filedistributionservice http://technet.microsoft.com/en-us/library/bb124697(EXCHG.80).aspx )

      Next, download again the OAB on your OL client , disconnect from the server ( to make sure you are using the OAB ) and search for the newly created user.

      If you can find it , it means that the OAB works just fine and the error message from OL is just something strange, or something you will need to address with an update to OL 2007 SP2 , latest patch if possible to see if you still get it.

      If the user is not there...then you really have an OAB issue and will have togheter a closer look.

       

      Hope it helps,

       

      Mihai

       

      • Marked As Answer by whosdis Tuesday, March 30, 2010 5:58 PM
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    All Replies

    • Monday, March 29, 2010 12:04 AM
       
       
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      Are you running Outlook 2007 sp1 or 2?

      Are you running in Cache or online mode? if cache mode, delete the profile and make sure you delete the ost in c:\documents and settings\username\application data\microsoft\outlook and try it again.

       
    • Monday, March 29, 2010 9:12 AM
       
       Answered
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      Hello,

      first thing I would check is to verify if the OAB really downloaded or not ( I say thi sbecause it seems that you have some contradictory information reported)

      SO , create a new test user in your Domain, force a generation of the OAB on the mailbox server from the console ( or run update-offlineaddressbook). Then force the File Distribution service on the CAS to copy over the new oab file (update-filedistributionservice http://technet.microsoft.com/en-us/library/bb124697(EXCHG.80).aspx )

      Next, download again the OAB on your OL client , disconnect from the server ( to make sure you are using the OAB ) and search for the newly created user.

      If you can find it , it means that the OAB works just fine and the error message from OL is just something strange, or something you will need to address with an update to OL 2007 SP2 , latest patch if possible to see if you still get it.

      If the user is not there...then you really have an OAB issue and will have togheter a closer look.

       

      Hope it helps,

       

      Mihai

       

      • Marked As Answer by whosdis Tuesday, March 30, 2010 5:58 PM
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    • Tuesday, March 30, 2010 5:58 PM
       
       
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      Hi

      I am running Outlook 2007 SP2 and it's running cached mode.

      I have deleted the profile and all the files in the outlook folder but that didn't fix the problem.

      But thank you for your suggestion Mr. Vi.

       

      Following mihaiss's suggestion, i have created a new test user in the domain and did an update of the default offline address book, then did an update-filedistributionservice.  then i did a download of the oab and disconnecting from exchange.  that seemed to have fixed the problem.  the OL client is able to see the new test user in the Global Address List, and i no longer get warning event id 27 indicatint that the "oab download failed".  and the "copying offline address book template file" does not take few minutes to complete anymore.

      i'm puzzled, as i was certain that the exchange file distribution service was working.  the web folder and the shared folder have .lzx and the oab.xml files.

      perhaps the update-filedistributionservice did something to fix it.  either way, it works so thank you very much mihaiss.

       
    • Monday, October 03, 2011 9:22 AM
       
       
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      Hi,

      Will this solution help me to fix the issue with OAB synchronization. I mean if there are any update on any account and not getting displayed in OAB. Will it help me to fix that issue tooo?

       

      Shashi

      Shashi