Kurt,
Unfortunately Access really does not do well with a company intranet portal unless you have a Sharepoint.
If you are using an Access Desktop database there really is not a way to run in n a browser on a company intranet portal.
If you did not design, crete, and test it run on the company intranet portal from the start you will have may have to start over if it must be on the company intranet portal
If you have Access 2013 and Sharepoint Enterprise then you could also recreate the database as a web database and publish it to Sharepoint. The really bad news is that a web database can only use Macros.
NO VBA CODE!
See: Build and publish an Access database to SharePoint
The avove artice is about Acess 2010. Web database were greatly improved in 2013. I would only use 2013 that is you go that route.
What I do and also recommend for desktop databases:
Standard network deployment without using the company intranet portal. This will used everything you have already done with only a few minor tweaks.
You will need to install Access on each PC. The good news is that you can use the
free runtime version for all the PCs that do not have an Access license.
You will do a standard multi-user deployment. The database will be split. The front end local on each machine. The back end on a network share where the users have read and write permissions.
If you upsize the back end to SQL server then you can also develop an ASP/ASP.net web app for others. Now you can have a mix of front ends. Some uses with the Access front end and some in a browser with the ASAP.net front end.
