It probably depends on the employer. Mine just started this, and the financial advisors are through the 401K company (so if you have, say, Fidelity, then an advisor from Fidelity looks at your stuff, not an employee of your company). In fact, I signed up to have an appointment a couple of years ago, and DH came with. We "made his month" which were the advisor's words, in fact. The only downside was that he could only compute retirement as young as 55yo, which, if we continued on the same path as now, would mean we would actually have a higher monthly income than now. Which to me means we f'd up, and wasted time working that could have been spent not working. But it was nice to not only be told we are on the very right track (for traditional retirement) but also that we made him happy by being with-it client:s plenty of smiles and no teeth-knashing or crying. A good side-effect of Mustacianism!
