Upgrading from FortiManager v4.0 MR2
Step 1: Prepare FortiManager for upgrade
To prepare your FortiManager for upgrade:
1. Install any pending configurations.
2. Upgrade FortiManager to at least v4.0 MR2. See FortiManager v4.0 MR2 Release Notes for the upgrade procedure.
3. Upgrade all managed FortiOS v3.0, v4.0, and v4.0 MR1 devices to v4.0 MR2 or v4.0 MR3 Patch Release 12 or later. See Product Integration and Support for more information.
4. Disable migration mode on all ADOMs.
5. Switch FortiManager to Standalone mode if HA is enabled. FortiManager should finish synchronizing all data between the cluster members.