Have you tried Sharing in Onshape? Sharing allows you to collaborate with anyone in only four simple steps:
Select the Share icon in the top right.
Type in the email address of the person you would like to share with.
Choose the permission to give that person. Settings allow you to choose who can view, edit, comment or share.
Onshape then sends your colleague, vendor or partner an email, inviting them to your Document. If they don’t have an Onshape account yet, Onshape will create one for them. So if you haven’t shared any of your Documents yet, check out this video, and give it a shot!