For information I'm a web developer and live in France.
I will soon have an phone interview with a manager from company A so that we can discuss any mission they might have for me, if my profile would fit within the company and so on.
I was given the first name of the manager that would interview me and I looked her up on Linkedin with her first name and the name of the company and found her, supposedly. While the person I found could be someone else in the company A and not my interviewer, if it were to be the correct person I found that she worked for company B for quite some time and I'm also in contact with company B.
Would it be acceptable to ask her why she left company B ? Or would it be inappropriate since I'm the interviewee ?