Ah ok will do that way as yes, have multiple hosts to upgrade.
Am listing steps below post placing host in MM.
- Download offline bundle and place on Shared storage. (Done only once)
- Run esxcli software vib update -d "/vmfs/volumes/Datastore/DirectoryName/PatchName.zip". (PatchName will be the ESXi offline bundle zip file)
- Reboot manually (think it will not reboot automatically) and verify ESXi version/build is as expected.