When you use group policy to assign offline files and exclude certain file extensions, your Windows XP clients receive:

Warnings occurred while Windows was synchronizing your data.
Results: Offline files.
Unable to make file name available offline. Files of this type cannot be made available offline.

NOTE: Synchronization completes normally.

The only way to disable these annoying warnings:

1. Copy / Paste the following to a KeepProgressLevel.reg file:

REGEDIT4

\[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Syncmgr\]
"KeepProgressLevel"=dword:00000001

2. Merge the KeepProgressLevel.reg file with your registry.

NOTE: The KeepProgressLevel Value Name can have the following data values:

1 - Pause on errors.
2 - Pause on warnings.
3 - Pause on errors and warnings.
4 - Pause and display INFO.