1.- Create a backup of the Sync Service configuration
1.1.- Open Active Roles Synchronization Service Console
1.2.- Click on the settings (cog) icon
1.3.- Click Export Configuration
1.4.- Provide a configuration file name and path, and enter a password to encrypt the file with
1.5.- Click Ok
1.6.- When prompted the configuration profile saved successfully click ok
2.- Backup both Sync Service databases (config and data)
3.- Stop Sync Services on all servers (within the same instance)
4.- Move the SQL Database to the new host
5.- On Each Sync Service server within the instance:
5.1.- Open registry editor
5.2.- Navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\One Identity\Active Roles\Configuration\SyncService\DBConnectionStrings\QCConfiguration
5.3.- Modify the Data Source DWORD, changing the SQL Server to the new server
5.4.- If required change the Initial Catalog DWORD to the moved DBs name
5.5.- Navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\One Identity\Active Roles\Configuration\SyncService\DBConnectionStrings\QCExecutionData
5.6.- Modify the Data Source DWORD, changing the SQL Server to the new server
5.7.- If required change the Initial Catalog DWORD to the moved DBs name
5.8.- Close registry editor