Ask your IT department to allow emails from Autodesk. It may have been blocked.
Or use the Postini security and archive service to retrieve the welcome email.
- Sign into Postini at
https://login.postini.com/ and search for the Glue invitation with the subject line "Welcome to BIM 360 Glue" from
bim360glue-notifications@autodesk.com.
- Send the invitation to your inbox and approve the sender for all future emails.