Note: The method below is only available on Feishu V3.37 or above.
Team Code is 8 characters long and contains only letters. Please request it from your Team Admin who can follow these steps to find it:
Click your profile photo and go to Suite Admin - Add Members - View Team Code to copy and share the code.
Also, you can click Contacts - Organization - Add Team Member - View Team Code to get the code.
Click your profile photo - Administration - Invite Member to find the Team Code.
Also, you can click the Contacts icon on the left bar, and go to Organization - Add Team Member - Quick Invitation to get the Team Code.