Pats, has someone see following issue? I'm working in big company. We have corporate email address, it works on MS Outlook 2016. Everything is fine, usually, but yesterday I couldn't get access to my Inbox. Because MS Outlook said, that .pst password was reset. I don't know how it happen, our tech support team now on vacations. And in 3 or 4 days I have to get access there. I don't know where to say about it....
You would need to contact the IT-Administrator of your Company, he's responsible for the Passwords. That said, never use a Corporate email account for private emails! Send an Email to the IT Admin and cc to the owner and/or General Manager of the company ASAP! If you have the phone numbers (mobile) of those people, call them immediately!