How can I convert an Access Database to be on the Web

[MToure]

have created a fairly complex Access database for a non-profit company I
used to work for. They would like for me to convert the database to a web
application that their satellite offices could access and input data. This
would (a) afford us the opportunity to make changes to one database
application only (as opposed to 5 different copies - 1 for each satellite
office), and (b) allow all the information for the non-profit to reside on 1
server that is backed up daily thus enhancing security of the data.

I'm not sure
1. how to convert the access database into a web app that satellite offices
can connect to, input data and print information locally
2. what to tell the main office to install on their server in order to allow
this to happen

If anyone can give me good direction, or point me to some credible and
useful reading material, I would appreciate it.
Thank you -
MToure