If you are running Windows XP SP1 with the hotfix described in the following articles, and you can connect to the Windows server 2003 wireless network server:
826942 Wireless update rollup package for Windows XP is available.
892087 "At least one of your changes was not applied successfully to the wireless configuration" message when you try to add a wireless network to a Windows XP Professional-based computer.
When you create a wireless GPO on Windows Server 2003 SP1 or Windows Server 2003 with hotfix 811233, this Windows XP SP1 client can no longer connect to the wireless network.
NOTE: Windows XP SP2 clients can still connect.
The %SystemRoot%\Tracing\Eapol.log file contains (if you typed netsh ras set tracing eapol enabled):
\[988\] HH:MM:SS: ElGetUserIdentity: NULL sized EAP blob: continue \[988\] HH:MM:SS: ElGetUserIdentity: Error in calling GetIdentity = 703This issue occurs because the BLOB ( Binary Large OBject) provided by the GPO and sent to the client computer does NOT contain EAP ( Extensible Authentication Protocol) authentication information, making it null.
To resolve this behavior, upgrade to Windows XP SP2, or:
1. Start the Group Policy Object Editor.
2. Expand Computer Configuration / Windows Settings / Security Settings.
3. Right-click Wireless Network (IEEE 802.11) Policies and press Create Wireless Network Policy.
4. In the New Wireless Network Policy Properties dialog, select the Preferred Networks tab.
5. Press Add to add a preferred network.
6. Select the IEEE 802.1x tab.
7. Press Smart Card or other certificate in the EAP type field.
8. Press Settings to configure the properties of the selected EAP type.