My team often takes walks to a nearby coffee shop without me. I've received reports from some team members that during these walks, one of my reports in particular often chronically complains about management objectives and how 'everything we are doing is wrong' during these walks. In this, he is undermining me and not providing me the ability to defend or explain myself. I also suspect that he creates group-texts with my team and complains behind my back there too.
I have weekly one on one's with said employee. When I brought this up, he refused to change his behavior beacuse it is outside of work. I explained to him that his behavior outside of work is bringing down team morale and is impacting team's performance. He stayed firm that he has the right to express his dissatisfcation outside of work.
I'm really not sure where to go from here. We all vent and complain about work outsdie of work but doing so chronically with my team is damaging. I've asked him to come to me first so I can either 1) get buy in from him 2) change what we are doing or 3) explain that he needs to be professional and accept this decision. He still hasn't changed his ways.
Based on other MT feedback, this would be the type of person you remove from your organization, but how can I do so if the action is happening outsdie of work?