Although VMware OVF Tool displays the username as Administrator%40vsphere.local it will actually use the name you specified in the .INI file (i.e. Administrator@vsphere.local). If you look at the PowerShell screen shot above, you'll see the same thing but it works fine. OVF Tool does this because it uses a valid URI format where it just displays @ as %40. A browser URL bar will do the same.

If the command is not working for you, it is probably for some other reason.

Make sure your target= value is correct. Set it to something like:

target=vi://administrator@vsphere.local:PASSWORD@192.168.0.21/Datacenter1/host/esx1.myco.int

PASSWORD in upper case will cause OVF Tool to prompt for the real password so don't put the real password in the .INI file. The IP address 192.168.0.21 is the vCenter Server address. If you are not sure of the host or cluster name after the IP address, just put:

target=vi://administrator@vsphere.local:PASSWORD@192.168.0.21/

It will fail but will show you the possible completions which you can then add one at a time to the target line to complete it.

If it is failing for some other reason, send me a private message and include your .ini file. Also be specific about what error you see or what the symptoms are and I should then be able to help to resolve this.

Mark