A family of Microsoft relational database management systems designed for ease of use.
Hello ADRMediator, thank you for reaching out to the Q&A Forum and sorry for late reply.
If you're using Access 2003 or earlier versions (an .mdb file), please refer to this article: Set or change Access 2003 user-level security in current Access versions
And please note that user‑level security is no longer supported for databases created in Access 2007 or later (.accdb). If you convert an .mdb file to .accdb, Access will remove all existing user‑level security settings.
Additionally, I’d like to share that recent updates to Microsoft Access have introduced tighter security around SQL queries referencing external databases, which may contribute to the behavior you're seeing. I recommend reviewing the article “Query Reference to Remote Database Fails” to check whether it applies to your scenario.
Note: This information is provided as a convenience to you. These sites are not controlled by Microsoft, and Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please ensure that you fully understand the risks before using any suggestions from the above link.
You may also refer to this case where I discussed unblocking a Microsoft Access file, including the use of Trusted Locations. Please check whether the information there applies to your situation. I want to unblock my Microsoft Access File
If the issue persists, please provide a screenshot of the error along with additional details about your scenario, such as the steps you were performing, how the file was opened, and when exactly the error appears, so I can assist you more accurately.
I look forward to your reply.
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