Teamwork.7z -

Ensure the file came from a trusted source, as compressed files can sometimes be used to deliver malicious content.

Once I have that context, I can give you a better idea of what it is. Teamwork.7z

If the archive is encrypted, you will need the specific password provided by the creator. Ensure the file came from a trusted source,

A shared, secure container for sensitive collaborative data, requiring a password to open. Typical Steps for Handling a .7z File secure container for sensitive collaborative data