Hello, DingTalk friends can view the name of the certified main enterprise. Other information cannot be viewed. If you don't want your former colleague to see the name of the current company, please check if you are DingTalk friends, if he/she is your DingTalk friend you can delete your friends.
[Mobile Phone DingTalk]-[Me]-[Settings]-[Privacy]-[View Organization info], if you do not want to view other friends, it is recommended to keep it closed.