想要改进这个问题？更新问题，所以它是主题 for server fault。
现在，问题是： 如何更改密码？ 如何防止他的密码过期？
I created 1 user in AD and created mail box in exchange 2010 server. We implemented password policy for changing password in 45 days.
I was having crunch on licenses so, I deleted AD user and did not delete his mail box, so that he can access his mailbox.
Now, The questions are : How can I change his password? How can I prevent his password from expiring?
Remember that I have deleted his AD user.
That is impossible. Microsoft Exchange simply does not work without Active Directory. If you deleted user in Active Directory, mailbox becames disconnected - without any user to authenticate against.
I was having crunch on licenses
The correct answer to this question is to either acquire more licenses or switch to a platform that you can afford.