Exchange Sp2 breaks the hiding from GAL which means Exchange strips off the fax info. MS needs to fix this issue, please contact your Microsoft reseller.

Service Release 5
November 2, 2009The Service Release includes many important software fixes for Fax Server 9.4, fax board drivers, and Fax Server client applications. It is recommended for all customers running Fax Server 9.4. For a complete list of software fixes, refer to the ReadMe.
Customers and partners can download the software and Readme for Service Release 5 from the Open Text Knowledge Center at the URL below:
https://knowledge.opentext.com/knowledge/llisapi.dll/open/15703289
System Affected
Open Text Fax Server, RightFax Edition 9.4

Service Release 4
November 2, 2009
This service release includes Dialogic® Brooktrout® SDK 6.1.1, which includes maintenance fixes and new features including the ability to set T.38 QoS bits. See the Dialogic documentation for more information.

Service Release 3
November 2, 2009The RightFax 9.4 FaxUtil client application has been tested with the following virtualization products:
- Citrix XenApp Client version 11.0.0.5357 connected to Citrix XenApp Advanced, on Windows 2008 Server (64-bit and 32-bit).
- Microsoft Windows Server 2008 Remote Desktop Services version 6.0.6001.18000.
The following features and applications have been tested with Microsoft Internet Explorer 8:
- RightFax Web Access
- Web EFM
- Web Delivery
- HTML document conversion
- Certified Delivery

Service Release 2
November 2, 2009The following enhancements are new features were introduced with Open Text Fax Server (RightFax) 9.4 Service Release 2.
Support for SQL Server 2008 is introduced with this release.
Support for Windows Server® 2008 x86 32-bit operating systems is introduced with this release, with the following exception:
CAUTION With Windows Server 2008, Microsoft does not support server-side document conversion with Office 2007 applications on a server. To support server-side document conversions on a Windows 2008 Server, you must install Microsoft Office® 2003 and install the Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats. The compatibility pack is available at no cost from Microsoft.
- Office 2007 PowerPoint documents with watermarks have problems converting.
- Office 2007 Excel documents using the column feature (a new feature in Office 2007) have problems converting.
This service release includes Dialogic® Brooktrout® SDK 6.0.0, which includes the following enhancements.
- Support for Brooktrout fax boards installed on Windows Server 2008 x86 32-bit operating systems.
- The Brooktrout IP Configuration Tool has been extended to include an IP Configuration Wizard. The Wizard helps the user configure SR140 and TR1034 products when used in IP networks.