How to modify the corporate logo?

Hello, the enterprise logo is set, and the enterprise will have its own avatar. After setting, it cannot be cancelled, but it can be modified. The master administrator or authorized sub-administrator of the certified enterprise can set or modify, and both computers and mobile phones can be modified. The icon of the work notice and the icon of the mobile phone workbench also show the enterprise LOGO: computer: management background-settings-enterprise settings-enterprise LOGO upload, and the enterprise logo can be set. On the mobile phone side: address book-management-enterprise personalization-enterprise LOGO setting, you can set enterprise logo. Tips: 1. It is suggested that the size of the uploaded picture should be 640*640, and the size should not exceed1m. 2. Only certified enterprises can set enterprise logo.