device# show running-config tacacs-server tacacs-server host 10.2.3.5 encrypted-key "jahasjikjdoaskjuihuhiaoljsiaknkaiua="
# tacacs-server host 1.2.3.4 encrypted-key JMeYDVdBN4Vb-wx35d7HnXIE8BL9KLUcEcePFwMNGo
device(config)#
device(config)# tacacs-server host 10.2.3.5
device(config-tacacs-config)#
device(config-tacacs-config)# plain-key "changedsec"
device(config-tacacs-config)# end
device# show running-config tacacs-server tacacs-server host 10.2.3.5 encrypted-key "jahasjikjdoaskjuihuhiaoljsiaknkaiua="