VM license grace period monitoring enhancement

FortiGate VM now displays Last Check and Check Due fields, allowing administrators to track remaining time in the license grace period before shutdown. This is especially valuable in air-gapped or DDIL (denied, degraded, intermittent, or limited) environments, where connectivity to FortiGuard or FortiManager may be limited, and the new fields help prevent unexpected service disruption.

After FortiGuard validates the VM license, the new fields are shown under diagnose debug vm-print-license:

# diagnose debug vm-print-license
SerialNumber: FGVMSLTM25007716
CreateDate: Fri Jun 13 23:25:44 2025
License expires: Mon Jun 15 17:00:00 2026
Last Check: Tue Sep 23 09:45:00 2025
Check Due: Thu Oct 23 09:45:00 2025
Key: yes
Cert: yes
Key2: yes
Cert2: yes
Signature: yes
Model: SL (18)
CPU: 4 (subscription:4)
MEM: 2147483647
VDOM license:
  permanent: 2
  subscription: 0

Option	Description
Last Check	Time of last successful license check.
Check Due	Maximum graceful time from last check (30 days)

Use the get system status command to view the license expiration date:

# get system status
Version: FortiGate-VM64-KVM v8.0.0,build0067,250918 (interim)
First GA patch build date: 240724
Current Security Level: Low
Firmware Signature: not-certified
Virus-DB: 1.00000(2018-04-09 18:07)
Extended DB: 1.00000(2018-04-09 18:07)
Extreme DB: 1.00000(2018-04-09 18:07)
AV AI/ML Model: 0.00000(2001-01-01 00:00)
IPS-DB: 6.00741(2015-12-01 02:30)
IPS-ETDB: 6.00741(2015-12-01 02:30)
IPS-MLDB: 0.00000(2001-01-01 00:00)
APP-DB: 6.00741(2015-12-01 02:30)
AIAP-DB: 0.00000(2001-01-01 00:00)
Proxy-IPS-DB: 6.00741(2015-12-01 02:30)
Proxy-IPS-ETDB: 6.00741(2015-12-01 02:30)
Proxy-APP-DB: 6.00741(2015-12-01 02:30)
FMWP-DB: 0.00000(2001-01-01 00:00)
IPS Malicious URL Database: 1.00001(2015-01-01 01:01)
IoT-Detect: 0.00000(2022-08-17 17:31)
OT-Detect-DB: 0.00000(2001-01-01 00:00)
OT-Patch-DB: 0.00000(2001-01-01 00:00)
OT-Threat-DB: 6.00741(2015-12-01 02:30)
IPS-Engine: 7.01157(2025-08-29 19:17)
Timezone DB Version: 1.003
Timezone DB IANA Version: 2024a
Serial-Number: FGVMSLTM25XXXXXX
License Status: Valid
License Expiration Date: 2026-06-15
VM Resources: 1 CPU/4 allowed, 3946 MB RAM
Log hard disk: Available
Hostname: FGVMSLTM25XXXXXX