Is it possible to backup a VM Fortigate using Veeam backup?

We dont run any FGT as VM but we do run FMG as VM. And we do use VEEAM to backup it. At least it should be able to do replicas witihout installed agent.

While you backup may be successful, it might not have the most current live configuration in it. You need to check with Fortigate to verify that it supports VMware Backups using the VMware Backup APis and what kind of backup should it be (Crash Consistent? Application? etc.)

It may be that you have to set a script in the Fortigate to run every so often to dump the file in a directory in the Fortigate, then the VMware backups will contain the VM and the most current data as well.

While you backup may be successful, it might not have the most current live configuration in it. You need to check with Fortigate to verify that it supports VMware Backups using the VMware Backup APis and what kind of backup should it be (Crash Consistent? Application? etc.)

It may be that you have to set a script in the Fortigate to run every so often to dump the file in a directory in the Fortigate, then the VMware backups will contain the VM and the most current data as well.

You are best served by finding out what Fortigate's best practices are first, and then see if they support the other types of backups you want to conduct.