Update enhancements/monitoring/integration-with-topology-modes.md
Clarify edge cases when the cluster resource can't be found or read.
@@ -159,10 +159,12 @@ proposal, in-place upgrades are a non-goal right now.
### Version Skew Strategy
-If CMO reads a value that is neither equal to `HighAvailable` nor
-`SingleReplica`, it should consider that the topology is `HighAvailable`.
+If CMO can't find the `infrastructures.config.openshift.io/cluster` resource or
+reads a value that is neither equal to `HighAvailable` nor `SingleReplica`, it
+considers that the topology is `HighAvailable`.
-If CMO gets an error while reading the resource, it errors out and retries.
+If CMO gets any error other than `404 Not Found` while reading the resource, it
+errors out and retries.
## Implementation History
