Hello, if you need to set/modify the employee department or delete the employee, the administrator who has the authority of the contacts can operate as follows:
1, Mobile app: administrator in [DingTalk mobile app] - [Contacts] - find team / enterprise - [Organization Management] - [Company Contacts] - [Manage Employee & Department ] - click on the designated employee right edit ( pencil icon)], you can edit employee information or delete employees, or click [Batch] in the upper right corner to move employees to another department in batches or delete them from the current department;
2, Desktop client: the administrator login Admin Panel (oa.dingtalk.com) - [Contacts] - click on the designated employee, you can edit the employee information or delete the employee in the pop up window on the right side. If you double-select the box in front of the name, you can delete employees in batches.

[Tips]:
1. If you only want to adjust employee's department, you can click on the department where the employee is located to modify and save. Do not click to delete it completely;
2. One staff can be placed in multiple departments, you can just check multiple departments for the staff.
Guess you want to learn more about:
How to delete friends?