Understanding content security
Access uses an interface component called the Trust Center for its security model. Access desktop databases can be considered unsafe because they could have some type of macros, Visual Basic for Applications (VBA) code, or calls to unsafe functions embedded in their structure. Any desktop database with queries is considered unsafe by Access because those queries could contain expressions calling unsafe functions. Depending on where your database is located on the local computer drive or network share, Access silently disables any malicious macros or VBA code unless your database is considered a Trusted Document or stored in a Trusted Location.
The sample databases included with this book are not digitally signed, ...