You can set intranet permissions for the Document Center module. This gives you the ability to upload documents that are not relevant to the public but helpful to the staff, such as procedure instructions.
Important Notes:
You must remove guest viewing permissions at the module level, to remove them from an individual Document Center level.
Do not use Save and Push Down when you set permissions for pages and modules as it will change the permissions for all users.
Who can use this feature?
System Administrator
Instructions
Click Modules, and then the Content tab, then select the Document Center module:

Select the Permissions tab:

Uncheck Guest permissions:

Note:
Unchecking the Guest checkbox at the module level allows the Guest permission to be set in each individual folder.
Click the Save button:

Important Note:
Do not use Save and Push Down. It will change the permissions for all existing users.
On the Main tab, select Add Folder:

Give the new folder a Name:

Check the Show Archives box:

Uncheck Guest permissions and check your new intranet group permissions:

Select a save option:

Save Changes: Will save the work as an unpublished draft.
Save and Publish: Will save the work and publish it for viewing.
Cancel: Will delete your work.