Status when trying to exit says “Cannot completelogin dueto an incorrect user name or password.” Yes it says that with the poor spacing as well. To fix this simply disconnect the host, once complete the host will show disconnected. Now you right click the host again and choose to connect the host. You will again see the “cannot completelogin dueto an incorrect username or password.” message. However now you will be prompted to authenticate it. Once you complete this the host will be fine.
VMware ESXi 4.1 Host cannot exit maintainence mode.