With Aktenplatz you can invite colleagues to a project and share its files with them. If needed, you can also invite people from outside your organization as guests.
1. Open the user management
Open the project settings via the gear icon and click Users under Security on the left. Here you see the current members. Click the tile with the + to add a person.

2. Invite a person and set the role
The Add people dialog opens. Enter the person’s email address and choose their role on the right – for example guest, owner, or access only to the file attachments shared with them.

3. Add more people and save
Click Add More User to invite several people at once. With Save, an invitation is sent to all the addresses you specified.
Tip: use Create group to combine users into groups. You can also add people directly from the Board view via the share icon at the top – the effect is the same.
