This policy setting directs the system to wait for the remote copy of the roaming user profile to load even when loading is slow. Also the system waits for the remote copy when the user is notified about a slow connection but does not respond in the time allowed.This policy setting and related policy settings in this folder together define the system's response when roaming user profiles are slow to load.If you enable this policy setting the system waits for the remote copy of the roaming user profile to load even when loading is slow.If you disable this policy setting or do not configure it when a remote profile is slow to load the system loads the local copy of the roaming user profile. The local copy is also used when the user is consulted (as set in the "Prompt user when slow link is detected" policy setting) but does not respond in the time allowed (as set in the "Timeout for dialog boxes" policy setting).Waiting for the remote profile is appropriate when users move between computers frequently and the local copy of their profile is not always current. Using the local copy is desirable when quick logging on is a priority.Important: If the "Do not detect slow network connections" policy setting is enabled this policy setting is ignored. Also if the "Delete cached copies of roaming profiles" policy setting is enabled there is no local copy of the roaming profile to load when the system detects a slow connection.
System\User Profiles
Machine
At least Windows 2000
HKLM\Software\Policies\Microsoft\Windows\System!SlowLinkProfileDefault
UserProfiles.admx