I developed an Access app that was originally designed for a small number of users.

Since then the popularity has grown and so have the number of users.

Has anyone had any experience with multiple users (>10) simultaneously accessing a table cause performance issues?

The app has a form with combo boxes that pull the items from a table in a backend db. Occasionally these combo boxes fail to retrieve the items.

I am thinking too many people are accessing the back end to support the combos, but not sure.

Please help.