Workgroup (Microsoft Access)
MDW is a file extension for a work group file format used by Microsoft Access, a database management system.
MDW files contain information such as usernames and passwords of users authorized to access a secured database. MDW files have to be linked to an Access database in order to be effective.
Learn more about MDW files:
Search for answers to Microsoft Access-related questions at IT Knowledge Exchange.
Visit the Microsoft Access web page.