Microsoft Knowledge Base Article 315457 contains the following Introduction:

The article describes how to use the Burflags registry value to rebuild each domain controller's copy of the system volume (SYSVOL) tree on all domain controllers in a common Active Directory directory service domain.

The term SYSVOL refers to a set of files and folders that reside on the local hard disk of each domain controller in a domain and that are replicated by the File Replication service (FRS). Network clients access the contents of the SYSVOL tree by using the following shared folders:

We recommend the procedure that is described in this article as a last resort to restore a domain's SYSVOL tree and its contents. Use this procedure only if you cannot make the FRS functional on individual domain controllers in the domain. Use this procedure only if the bulk restart can be performed more quickly than troubleshooting and resolving replication inconsistencies, and time to resolution is a critical factor.

Important Domain controllers will not service authentication request during the procedure. Only when the SYSVOL and NETLOGON folders are shared again will the domain controller authenticate requests. This procedure should not be performed during peak hours.

Note See the "How to temporarily stabilize the domain SYSVOL tree" section of this article for information about how to temporarily stabilize the domain SYSVOL tree until you can complete all the steps in the "How to rebuild the domain system volume replica set across enterprise environments" section.

We strongly recommend that you monitor FRS performance and health by using monitoring tools. By using monitoring tools, you may prevent the need for replica set authoritative and non-authoritative restores, and you may provide insight into the root cause of FRS failures. The following monitoring tools are available for download:

Ultrasound is a powerful tool that measures the functioning of FRS replica sets by providing health ratings and historical information of these sets. The Ultrasound tool is a sophisticated monitoring system that uses Windows Management Instrumentation (WMI) providers, a data collection service, a Microsoft SQL Server Desktop Engine (MSDE) database, and a powerful user interface. To download this program, visit the following Microsoft Web site:
Sonar is a lightweight tool that runs on any system with the Microsoft .NET Framework. Sonar gives you a quick overview of the FRS and is ideally suited for environments that have not been actively monitored and that need an immediate feedback tool. To download this program, visit the following Microsoft Web site: