As we all know, in PS 2010, whenever a project is published, the default setting is to create a Project Site automatically.

Of course, we can control this setting by setting the provisioning settings to Manual under the Project Site Provisioning Settings, as shown below. This will prevent the project site from being created automatically.

However, this still does not prevent from the pop-up to create a project site showing up for the user when he tries to publish the project from Project Professional. Something similar to this:

At any given time, the user could select the option to create a site ( even accidentally). The question is that what if your governance policies do not allow users to create project sites by themselves? How do you disable the pop-up from showing up?

The trick is that there is this Global Permission, “Manage SharePoint Foundation”, which controls this. However, you have to “Deny”  this permission for the Security group that you do not want to see this pop-up (instead of just “Not Allowing” it).

Once you do this, your users will not see the pop-up any more. Then based on your Governance, the admin can create the site as needed basis.