If the integration components installed on a VM are older than the integration components available to be installed from the host, Veeam logs a warning in the job log. However, the icon is a green check mark and the job ends with a green check mark. Most admins don't spend time looking at the logs of the jobs that reported success. I'm thinking it would be better if Veeam flagged this as a true warning to get attention from the admin. (Perhaps allow for an override to be set in cases when the IC can't be updated for some reason.)
There's a screen shot in this blog entry that shows what a job log looks like when this condition is detected.https://blog.workinghardinit.work/2015/ ... 600-17831/
In the case of the blog entry, the system admin installed new IC components onto the hosts without telling the VM admin. The VM admin found the version mismatch by accident while troubleshooting an unrelated issue.