From Array Suite Wiki
DefaultProjectAccess controls which group(s) will have the full Read access for each newly created project. The default when this isn't specified is that the standard users group will have access. To configure a different set of groups, prefix each with [usergroup] to indicate it is a group name like
A project is created (and access initialized per this configuration) when the first sample is registered in the Sample Meta Data for the project.
Note, after the first sample is added, if you wish to confirm the access has been initialized per this setting, be sure to log off the server and back on before checking the Project Access Controls