Strange Error with OAB and System Public Folders in Exchange 2007

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I once ran into an interesting issue with a customer, with an error regarding to Public Folders that is not documented anywhere. My customer was using Exchange 2007 together with Outlook 2003 Clients. Of course he had the Offline Address Book published in System Public Folders.

The problem was that Outlook 2003 clients couldn’t download the OAB and were getting the error 4010F – not found.

After inspecting the OAB generation server we saw that we had no errors whatsoever and the OAB was generated successfully every time.

When opening the Exchange 2007 PF Management Console and looked into the System Folders, we could see that under the parent entry OFFLINE ADDRESS BOOK everything was missing (including the "/o=Organization/cn=addrlists/cn=oabs/cn=Your_OAB" , so the very entry for the Organization and Administrative Group itself).

Here comes the interesting part: when we went into the Management Shell and ran

Get-PublicFolder "\NON_IPM_SUBTREE\OFFLINE ADDRESS BOOK" -Recurse

we received the following error:

 

Get-PublicFolder : MapiExceptionObjectDeleted: Unable to open entry ID. (hr=0x8

004010a, ec=-2147221238)

Diagnostic context:

Lid: 18969 EcDoRpcExt2 called [length=55]

Lid: 27161 EcDoRpcExt2 returned [ec=0x0][length=204][latency=1]

Lid: 23226 --- ROP Parse Start ---

Lid: 27962 ROP: ropOpenFolder [2]

Lid: 17082 ROP Error: 0x8004010A

Lid: 21857

Lid: 21921 StoreEc: 0x8004010A

Lid: 27962 ROP: ropExtendedError [250]

Lid: 1494 ---- Remote Context Beg ----

Lid: 26426 ROP: ropOpenFolder [2]

Lid: 23921 StoreEc: 0x3EC

Lid: 21970 StoreEc: 0x8004010F PropTag: 0x668F0040

Lid: 23921 StoreEc: 0x3EC

Lid: 21970 StoreEc: 0x8004010F PropTag: 0x663A000B

Lid: 23921 StoreEc: 0x3EC

Lid: 21970 StoreEc: 0x8004010F PropTag: 0x66C40003

Lid: 21970 StoreEc: 0x8004010F PropTag: 0x3D210102

Lid: 21970 StoreEc: 0x8004010F PropTag: 0x3D210102

Lid: 4547 StoreEc: 0x8004010A

Lid: 6719 StoreEc: 0x8004010A

Lid: 7007 StoreEc: 0x8004010A

Lid: 1750 ---- Remote Context End ----

Lid: 31418 --- ROP Parse Done ---

Lid: 22894

Lid: 24942 StoreEc: 0x8004010A

At line:1 char:17

+ Get-PublicFolder <<<< "\NON_IPM_SUBTREE\OFFLINE ADDRESS BOOK" -recurse

+ CategoryInfo : NotSpecified: (0:Int32) [Get-PublicFolder], Mapi

ExceptionObjectDeleted

+ FullyQualifiedErrorId : 89BC97D1,Microsoft.Exchange.Management.MapiTasks

.GetPublicFolder

We then ran Get-PublicFolderStatistics, and we could see that the individual OAB folders (V2, V3 and V4) were actually there. So apparently the Store had these folders but was unable to open their entry IDs.

 

We ran “Get-PublicFolderStatistics | fl Admindisplayname,folderpath,entryid,isdeleted".

From the outputs, it was apparent that the OAB folder "/o=Organisation/cn=addrlists/cn=oabs/cn=Your_OAB" had the sitefolderGUID

matching the one of the Exchange Administrative Group, while it’s not supposed to match!!!

 

At this point you have two options:

 

1. If you want to keep your existing OAB, then you can go for resetting the OAB system public folder by changing it’s SiteFolderGUID with the GUIDGen Tool according to

How to Reset System Folders

https://technet.microsoft.com/en-us/library/bb331972(EXCHG.80).aspx

2. Or you can remove your existing OAB and create a new one.

Be sure to dismount and remount the Public Folder Store after performing one of the two operations.