"To reach a resolution" means to come to a decision or agreement in order to solve a problem or settle a dispute. It means finding a solution or reaching a conclusion that is acceptable to everyone involved. Full definition
I have helped people reach resolution in as few as two sessions in one week and in as many as 20 sessions over the course of a year. (ecmediation.com)
The coordinator will listen to each parent's side of the story and attempt to reach a resolution of the dispute through information gathering and consensus building. (bcparentingcoordinators.com)
The court might be reluctant to give joint custody to parents who are unwilling to cooperate with one another or who can not reach resolutions on major parenting issues, however. (info.legalzoom.com)