How to check upgrade status of Agent in Host-based Security menu?
You can check it from the management console.
For the current version, you can double-click the target host and check it in "Version" described in [Overview]> [Processing]> [Software].
The latest version is displayed in [Administration]> [Update]> [Software]> [Local], so you can check with it.
You can also confirm by setting alert from [Alert].
It is also possible to notify e-mails of alerts.