Module Security controls which workgroups have access to use which modules in the system, When launching enVisual, if you select a module that you do not have access to will mean that you cannot login to enVisual until you deselect the modules that you do not have access to.
To Change Module Security you can go to the Security tab and click the System Security button. When the System Security screen has loaded you can click on the Module Security tab to access module security as below.
To change the Module Security you can select the desired module from the drop down list and then use the add, add all, remove, remove all buttons to manage which security groups have access to the different modules. A point to note it that a user may have security to access a module, but may not have security to access any area of the module, as the different areas are controlled by Workgroup Security.