Hermed et svar fra linket:
http://en.allexperts.com/q/Using-MS-Access-1440/Multiple-users.htm--------------------------
First Access was designed as a multi-user system. So there is no problem with multiple people accessing the tables at the same time. You might get into a hassle if two people try to change the same record simultaneously, but that should happen very rarely.
One thing you NEED to do is split the database. There is a Splitter Wizard under Tools>Database that will move all the tables into a back end and leave everything else in the front end. The back end should be placed on a shared network drive. For best performance the front end should be local to each client PC. But with only 4 users, you might not have a problem storing the FE on the network share too.
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En mere udførlig vejledning finder du her:
http://www.aspfree.com/c/a/Microsoft-Access/Upgrading-your-Access-Application-for-a-Multi-user-Environment/