?NSF Files are created when a user is working on Lotus Notes email client. This Notes Storage Format (NSF) file is used to save email messages, notes, contacts, calendars and other email items. Lotus Notes is integrated with Access Control List (ACL) feature that offers a list of permissions related to an object. An administrator can apply number of access rules for local users regarding access to a particular file. Applying these rules over NSF file, the file owner gives the local users the privilege to open or work on the NSF file. However, when a user not having the access rights to the particular NSF files, tries to access the file, gets the following error message: "You are not authorized to access that database" The error message clearly indicates that the user accessing the Notes.nsf file is not authorized to access the file. In other words, the owner of the file doesn't gives you the right to perform basic functions such as open, manage, edit, design, modify his/her NSF file. Security removal from NSF file is a tricky issue and needs to be resolved diligently. As discussed above, NSF database file comes with the feature of Access Control List (ACL) that controls all local securities and encryptions into the NSF database files. With Access Control List, local securities are sustained over nsf files to prevent any kind of illegitimate utilization of vital organizational information. The occurrence of above mentioned error message is a quite a common phenomenon that happens when an unauthorized user tries to open a secure NSF database file. Only an administrator or other authorized person can access such database. But what will you do, if accessing the file is important without you having access rights. You can access a secured NSF file with the use of NSF local security removal software. This tool helps you remove local security from the selected NSF file as well as it helps you to reapply it. Consider a situation, when the file owner is not available and you have to access the file urgently, then at this point in time, removing the local security is the only option left for gaining the access rights to the file. Using an expedient NSF local security removal tool you can easily resolve the "You are not authorized to access that database" error message. However, the tool is not suggested for encrypted NSF files. Once you are done with your work, you can reapply local security to avoid unauthorized and unnecessary access to the file. The third party tools available in the market allow you to remove local security from the NSF files so that users can continue working without sheer wastage of time in waiting for the file owner to provide with access privileges.