Forum Discussion
How to Share MS Access forms Online
I read the question a little differently.
You can't share the interface elements of an accdb online in the sense most people probably think of.
Access runs on the desktop, so you won't put Access forms directly into the browser.
That said, there are ways to make the DATA available to a browser-based interface, which would need to be built for that purpose.
SharePoint itself is not an option. Access accdbs are not designed to work properly when run from SharePoint, but as Karl pointed out, you can migrate the data to SharePoint to share the data that way.
Probably experienced Access developers prefer the other approach Karl suggested, SQL Azure or a hosted SQL Server.
Depending on the number of users and volume of data, and how much your organization is willing to invest in an online solution, there are several ways to deploy an interface for the online environment. You can always deploy the Access FE to users so they can put it on their own computer and connect to your data in "the cloud".