It’s plenty of tools out there on the internet but most of them are not free. <a href=”www.nirsoft.net/utils/pst_password.html”>check this tool</a>
I would tread lightly in this scenario. Yes it is “company” email however this user is going to feel unjustly violated if his password is removed without his knowledge or permission. To be fair to the user, notify them first of the problem. Seek permission to remove the password or seek to do this at a time when they can be present to input their password. Is this inconvenient to you? Yes, however keeping good relations with the people we work with is important. I would say respect the password first until all other options are exhausted. It will save a LOT of headaches, trust me!