How to see if someone has access to your Confluence space

If you are a space admin (someone who can set permissions on a space), you should see Space Tools in the lower-left corner like this:
Open Space Tools, then go to Permissions.
On this screen, you can add individual users (in the Individual Users section) or all Confluence users by adding "sda-confluence-users" (in the Groups section). Typically, most users require these roles:
1. All - View
2. All - Delete Own
3. Pages - Add
4. Pages - Delete
5. Attachments - Add
6. Attachments - Delete
7. Comments - Add
8. Comments - Delete
9. Restrictions - Add/Delete
When your changes are complete, click Save All at the bottom of the screen, and you're done!