Whenb I connect to my esx 5i with vsphere client 4 i Must upgraded ti the last client
The pbm is that when i want to connect to esx 4i, he ask me again to install the vsphere 4 client
I thoughtre that with the vsphere 5 client I can connect to esx 4i
i guess you have uninstalled vSphere Client 4 before installing vSPhere 5 client. Both client coexist on same windows machine and will choose the right one based on the target VC or ESX during login.
as stated, you'll need both clients, if connecting to multiple vSphere builds. The launcher.exe within the client will determine what version to proper launch when you connect to your virtual infrastructure.