FortiClient EMS 7.4.5 only supports upgrade from earlier 7.4 versions (see FortiClient and EMS Upgrade Path). If your current EMS version is 7.2 or earlier, see Migrating EMS 7.2 to 7.4.5.

• EMS 7.4.5 only supports FortiClient 7.4 and 7.2. You must first upgrade older FortiClient versions to 7.4 or 7.2 before upgrading EMS to 7.4.5.
• Internet access is required for the upgrade process. Do not attempt the upgrade if there are network restrictions. We recommend temporarily allowing all Internet access during the upgrade window.