This policy setting sets the schedule for background uploading of a roaming user profile's registry file (ntuser.dat). This policy setting controls only the uploading of a roaming user profile's registry file (other user data and regular profiles are not be uploaded) and uploads it only if the user is logged on. This policy setting does not stop the roaming user profile's registry file from being uploaded at user logoff.If "Run at set interval" is chosen then an interval must be set with a value of 1-720 hours. Once set Windows uploads the profile's registry file at the specified interval after the user logs on. For example with a value of 6 hours the registry file of the roaming user profile is uploaded to the server every six hours while the user is logged on.If "Run at specified time of day" is chosen then a time of day must be specified. Once set Windows uploads the registry file at the same time every day as long as the user is logged on.For both scheduling options there is a random one hour delay attached per-trigger to avoid overloading the server with simultaneous uploads. For example if the settings dictate that the user's registry file is to be uploaded at 6pm it will actually upload at a random time between 6pm and 7pm.Note: If "Run at set interval" is selected the "Time of day" option is disregarded. Likewise if "Run at set time of day" is chosen the "Interval (hours)" option is disregarded.If you enable this policy setting Windows uploads the registry file of the user's roaming user profile in the background according to the schedule set here while the user is logged on. Regular profiles are not affected.If this setting is disabled or not configured the registry file for a roaming user profile will not be uploaded in the background while the user is logged on.
At least Windows Server 2008 R2 or Windows 7
HKLM\Software\Policies\Microsoft\Windows\System!UploadHiveMethod HKLM\Software\Policies\Microsoft\Windows\System!UploadHiveInterval HKLM\Software\Policies\Microsoft\Windows\System!UploadHiveTime