Unable to import ESX/ESXi 4.1 upgrade package to VMware Update Manager 4.1
Cannot import the ESX/ESXi 4.1 upgrade package to VMware Update Manager 4.1
Import Upgrade Releases option is greyed out
Unable to upload upgrade files via Host Upgrade Releases tab
To import upgrade packages, you must have the Upload File privilege. You can assign Update Manager privileges to different roles from the vSphere Client. For more information, see the Update Manager Privileges section of the VMware vCenter Update Manager Installation and Administration Guide.
After updating the permission, ensure to logout and login again to vCenter Server using VI Client and then try to import the ESX/ESXi 4.1 upgrade package.