Prepare FortiManager as the update server

Log in to FortiManager.
Go to FortiGuard > Settings.
Go to Upload Options for FortiGate/FortiMail > Antivirus/IPS Packages, and click Upload.
Select the packages downloaded and available on removable media, and install them on FortiManager.
After the installation is complete, all the required packages should be available on FortiManager.
Go to FortiGuard > Package Management > Receive Status. You should see the packages with the corresponding installation date.

To prepare FortiManager as the update server:

Go to FortiGuard > Settings.

Go to Upload Options for FortiGate/FortiMail > Antivirus/IPS Packages, and click Upload.

Select the packages downloaded and available on removable media, and install them on FortiManager.

After the installation is complete, all the required packages should be available on FortiManager.

Go to FortiGuard > Package Management > Receive Status. You should see the packages with the corresponding installation date.