Import projects and messages from Basecamp to add as new forums and threads in your organization.
To import projects from Basecamp:
Go to the drop-down menu on the top left side of Threads
Go to the Basecamp section, and click Import from Basecamp
Only people who had access to the messages in Basecamp will be added to the threads that are started.
Here's what it looks like when you import projects from Basecamp into Threads"