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Breaking Change : The System Attendant mailbox has been removed from Exchange 2010
06 October 09 09:45 AM | dvespa | 0 Comments   
In previous versions of Exchange, the System Attendant (SA) Mailbox was used by the link monitoring service and for publishing Free / Busy information. However, this functionality is no longer needed in Exchange 2010. As such the mailbox has been removed. Read More...
Why doesn't my Exchange Client Extension load on Windows Vista
14 March 08 07:21 PM | dvespa | 0 Comments   
We had several cases lately where customers are asking this very question. The answer is basically User Account Control (UAC) . If a user is using Vista with UAC enabled Outlook is running with medium Integrity Level (IL). When a process runs with medium Read More...
MAPI Forms don't launch when dowloaded from the Exchange Org Form Lib on Windows Vista
19 July 07 10:59 AM | dvespa | 0 Comments   
After working this issue for just about six months I am finally at the stage where I can blog about this. Windows Vista changed the COM Activation model to prevent activiation of COM components registered in HKEY_CURRENT_USER when the COM client is running Read More...
VSTO 2005 Addin does not load in Outlook 2003 if UAC is disabled
07 June 07 10:33 PM | dvespa | 0 Comments   
Windows Vista changes the COM Activation model and will no longer create components registered in HKEY_CURRENT_USER (HKCU) if the client application is running with a Integrity Level (IL) of higher than medium. So when UAC is disabled, Outlook will run Read More...
Accessing Exchange's Extended MAPI from a 64-bit Process *
22 March 07 07:25 PM | dvespa | 1 Comments   
As you know Exchange 2007 has moved to the 64-bit space, however Exchange’s implementation of Extended MAPI did not. You can still download Exchange's Extended MAPI here , however it is only a 32-bit version. If you are moving your Exchange application Read More...

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