Active Directory domain services might not come up after a Failover, if chkdsk errors occur. Two avoidable causes of chkdsk errors are:
Log files related to Microsoft Updates if the source machine is not up-to-date with all Microsoft recommended patches or updates when you perform the first full replication.
System files and folders that should be excluded from your anti-virus software.
To avoid these issues, NetIQ recommends the following best practices before you run the first full replication:
Ensure that you update Windows (Windows Update) on your source system before you run the first full replication. If the Windows machine is a Domain Controller, ensure that you also disable anti-virus software on the system during the replication.
Ensure that you set up your anti-virus software with the recommended file and folder exclusions described in the Microsoft Knowledge Article: Virus scanning recommendations for Enterprise computers that are running currently supported versions of Windows (KB: 822158).