There is registry key available for this in ChangeAuditor 6.0 and higher:
6.9.5+
Topology harvest frequency:
Location: Registry
Path: HKEY_LOCAL_MACHINE\SOFTWARE\Quest\ChangeAuditor\Coordinator
Value Name: TopologyHarvest
Value Type: DWORD
Value: 180 minutes (default)
Value: 0 - turn OFF
1 or more - turn ON in MINUTES
Note:
The topology task must run before Agents can be deployed to NEW servers in the forest.
