Hello, if a friend/colleague wants to register DingTalk, they can download it on the DingTalk website (www.dingtalk.com) or app store/app market. After installation, click sign up to register, enter the mobile phone number and SMS verification code then you can be registered.
If it is an overseas mobile phone number, select the corresponding country and region when registering, then enter the mobile phone number, follow the instructions on the page to register successfully.

Tips: A mobile phone number can only be registered with one DingTalk account.