樓上的顧曲說的不錯.
再補充3點:
1,你得在你們的TEAM MEETINGS 明確地list your expectations, emphasize 客戶 support 的重要性.
2.depending on how much resource you have, you can issue on-spot reward or regnition or express your appreciations to positve behaviors in the meetings,
to promote the positive team dynamics, and
let people know who is calling the shots.
3. Last resort is that if she keeps doing that way, 冷藏她.