Windows Fax has some shortcomings concerning how address lists are being used. The original design was to allow the Windows Fax client to use Outlook's address lists whenever Outlook was installed. However, due to incompatibilities between 32-bit and 64-bit, there are some issues where the fax client would not use Outlook, even though Outlook has been installed properly. Unfortunately, if such is the case, there's no real solution, other than switching the architecture of the OS or upgrading to a newer OS. I've jotted down a short and simple matrix of OS and Office versions to indicate which combination is known to work properly with Outlook's address lists.

table.compatma  ...

When you're planning on configuring Fax Services on Server 2008, 2008R2, and their SBS counterparts (SBS 2008 and SBS 2011), it's strongly recommended to install these hotfixes as they resolve intermittent crashes with the Fax Server services.

• http://support.microsoft.com/kb/2302075
  
• http://support.microsoft.com/kb/973640
  

It's highly recommended to install both hotfixes. On the link above, select the proper hotfix for your version of Windows Server. For SBS-users, select these:

• SBS 2008 → 2008
• SBS 2011 → 2008R2

The SBS 2011 Fax printer 32-bit drivers currently shipped with SBS 2011 are not compatible with Windows XP. They only work with Vista and newer. Attempting to send a fax on an XP machine with these settings does nothing and no error messages are displayed.

To solve, you can use the driver from SBS 2003 SP2, as these are compatible with the SBS 2011 Fax system. They can be found inside the Windows 2003 SP2 download (see below for detailed instructions), or directly from an SBS 2003 (located in c:\windows\system32\spool\drivers\w32x86\3. The files you need are these:

FXSAPI.DLL

FXSDRV.DLL

FXSRES.DLL

FXSTIFF.DLL

FXSUI.DLL

FXSWZRD.DLL

Most people won't have an SBS 2003 with SP2 anymore.   ...