
Ok, well, since this is a JET engine file (mdb), then you should not have to actually install anything.
You only need to install/use/setup/have the newer ACE data engine if you are using a accdb file format, and not mdb file format.
There is ALSO a 2nd criteria here, and that is ensuring that the IIS web server also has x32 bit support turned on. While near all (everything) these days runs as x64 bits, if you do run the IIS server (which is going to be x64 bits), then you can turn on x32 bit support.
that would be this setting:
So, you only really have to install ace/access runtime x64 if you BOTH using a accdb file, or you want/need/will run the application pool for the web site as x64 bits. But, as above shows, you can still run/have/use/enjoy an application pool as x32 bits for that web site.
And since windows xp days, and that includes server based editions of windows? They all STILL have a version of the JET data engine installed (but, it ONLY x32 bit version).
So, if you want to run the web site as x64 bits? Then yes, you need to install + setup access (or ACE) data engine as x64 bits.
However, with the web app pool set to run as x32 bits, then you don't even have to install anything on the web server, since as noted, the JET data engine is installed by default.