I'm getting the question quite often now about how to get an Ericsson device to successfully authenticate through ISA 2006 for ActiveSync.
The Problem: When we connect with an Ericsson device through ISA 2006 for ActiveSync we’re trying to use Forms-Based authentication instead of Basic and the authentication will fail. A Windows Mobile device will automatically perform a fall-back to Basic authentication and can then successfully authenticate but some other devices, for example an Ericsson device won’t automatically fall-back to Basic authentication.
Solution 1: Create a new web listener that only will use Basic authentication and then publish active sync to use that web listener.
Solution 2: Change the user agent mapping to get a device with the User Agent “SonyEricsson” to use Basic authentication instead of Forms-Based authentication.
1. Copy the “edit-user-agent.vbs” to the ISA 2006 server.
2. Open a command prompt and run the script: cscript edit-user-agent.vbs
3. Restart the firewall service
For more information about managing User-Agent Mappings in ISA 2006:
http://www.microsoft.com/technet/isa/2006/development/useragentmappings.mspx