InfiniTec - Henning Krauses Blog

Don't adjust your mind - it's reality that is malfunctioning

Exchange 2007 SP1 Item ids

Exchange 2007 introduced a new URL format (Constructing OWA 2007 item ids from WebDAV items) which contained an arbitrary item id, which was based on the EntryId of the item. The format was this:

Length Meaning
1 Length of the structure
sizeof(EntryId) EntryId
1 Item type

This format changed with Exchange Service Pack 1. The layout is now this:

Length Meaning
4 Length of the user's email address
sizeof(EmailAddress) Email address specifying the mailbox which contains the item
4 Size of the EntryId
sizeof(EntryId) The EntryId of the item

This layout also applies to folder ids within a mailbox.


   1: <UIRefId="WixUI_Minimal"/>
   2:         <BinaryId="ManagedCustomAction"SourceFile="Include\ManagedCustomAction.dll" />
   3:         <ManagedCustomActionId="test"BinaryKey="ManagedCustomAction"Type="ManagedCustomAction.CustomAction"Execute="immediate"xmlns="" />
   4:         <ManagedActionSequencexmlns="">
   5:         <ManagedAction="test"After="CostFinalize"SequenceTable="InstallUISequence" />
   6:     </ManagedActionSequence>
   7: </Product>

Posted by Henning Krause on Thursday, May 15, 2008 6:42 PM, last modified on Thursday, May 15, 2008 8:08 PM
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