Allow cross-forest user policy and roaming user profiles

This policy setting allows user-based policy processing roaming user profiles and user object logon scripts for interactive logons across forests. This policy setting affects all user accounts that interactively log on to a computer in a different forest when a trust across forests or a two-way forest trust exists. If you do not configure this policy setting:- No user-based policy settings are applied from the user’s forest. – Users do not receive their roaming profiles; they receive a local profile on the computer from the local forest. A warning message appears to the user and an event log message (1529) is posted. – Loopback Group Policy processing is applied using the Group Policy Objects (GPOs) that are scoped to the computer. – An event log message (1109) is posted stating that loopback was invoked in Replace mode. If you enable this policy setting the behavior is exactly the same as in Windows 2000: user policy is applied and a roaming user profile is allowed from the trusted forest. If you disable this policy setting the behavior is the same as if it is not configured.

Additional Information

  1. Registry path is:

    HKEY_LOCAL_MACHINE -> Software -> Policies -> Microsoft -> Windows -> System # AllowX-ForestPolicy-and-RUP

  2. The Administrative Template path is:

    System -> Group Policy


* Making mistakes while changing registry values can affect your system adversely. We recommend you to create a System Restore point before making registry manipulation. If you're new to Registry Editor, read this beginner's guide.
** To locate the registry and administrative template path, checkout beginner's guide.
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