Asking for a friend 
A process that has been working well for the past few years in my work place has been recently challenged by a team (who have to provide the information to our team). Without this information , the process doesn’t work as such there is a hard dependency on the info.
My colleague spoke to our team manager to advise why this proposal was not beneficial for the company , highlighting the extra costs this could have.
Manager initially seemed to take this all on board. A meeting was then had with opposing team and colleague . This resulted in my colleague’s view being shut down. Manager issues a mail advising that the process needs to be changed and that colleague needs to get with others in the team to think of a way to “make the process suit everyone involved ” .
Colleague replied to manager’s mail, articulating that they had continually gave their steer and advice but felt that their view was not being heard and therefore was struggling to see what much else they can add.
Since then manager has fed back to colleague that they need to be contributing as a team member and not doing so is unprofessional. WIBU?