system upgrade-path
Use these commands to show which FortiMail software versions have been previously installed, and when they were installed.
This can be useful to verify that the supported upgrade path (see the FortiMail Release Notes) has been followed. If the path has not been followed, then you may need to restore the configuration or re-configure settings that were not supported along part of the path.
Syntax
diagnose system upgrade-path
Example
FortiMail # diagnose system upgrade-path
System Time: 2025-06-03 17:00:51 EDT (Uptime: 3d 23h 59m)
From To Time
v6.4 b0398 v6.4 b0446 20210426 12:41:59 UTC
v6.4 b0446 v7.0 b0161 20211014 20:25:16 UTC
v7.0 b0161 v7.2 b0392 20230411 13:45:58 UTC
v7.2 b0392 v7.4 b0507 20230504 15:19:14 UTC
v7.4 b0507 v7.4 b0508 20230504 18:51:19 UTC
v7.4 b0600 v7.6 b0773 20250328 15:34:56 UTC
v7.6 b0773 v7.6 b0788 20250331 17:29:33 UTC
v7.6 b0788 v7.6 b0789 20250401 18:38:29 UTC
v7.6 b0789 v7.6 b0790 20250407 13:44:47 UTC
v7.6 b0790 v7.4 b0607 20250414 19:38:05 UTC
v7.4 b0607 v7.6 b0792 20250415 19:11:14 UTC
v7.6 b0792 v7.2 b0422 20250417 19:05:40 UTC