通过查看ULS日志, 可以发现下面的记录
ILM Configuration: The ValidateMiisEncryptionKey process returned True.
Synchronization database was not previously initialized. Exporting the encryption key from the registry key to the database
ILM Configuration: The ExportMiisEncryptionKey process completed successfully
UserProfileApplication.SynchronizeMIIS: Failed to configure MOSS initial MAs, will attempt during next rerun. Exception: System.Management.ManagementException: Generic failure
at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode)
at System.Management.ManagementObjectCollection.ManagementObjectEnumerator.MoveNext()
at Microsoft.Office.Server.UserProfiles.Synchronization.ManagementAgent.ManagementAgentCollection.ManagementAgentEnumerator.MoveNext()
at Microsoft.Office.Server.UserProfiles.UserProfileConfigManager.IsMossMaConfigured(UserProfileApplication application)
at Microsoft.Office.Server.Administration.UserProfileApplication.SetupSynchronizationService(ProfileSynchronizationServiceInstance profileSyncInstance).
解决方案
$syncdb=Get-SPDatabase <SyncDBGUID>
$syncdb.Unprovision()
$syncdb.Status='Offline'
$upa=Get-SPServiceApplication <UPSAppGUID>
$upa.ResetSynchronizationMachine()
$upa.ResetSynchronizationDatabase()
$syncdb.Provision()