You cannot use Adobe Acrobat on a server - it's technically and legally not qualified for this task.
Here are some general ideas, but what exactly you need to do depends on your server setup.
You can create a form that has form fields for the variable information, the rest of the document (e.g. the border and e.g. pictures of signatures, ...) are static content. This form can be created in Adobe Acrobat. You can then fill in the form in Acrobat or the free Reader to see if the formatting is correct, and print a proof.
Once you are satisfied with your form, you need to automate filling in the form. This can be done with a data merging application on the server: You would extract the data from the database, and then merge it with the interactive form you've created. There are different ways you can do that. A cheap and simple way is to use the pdftk (http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/) tool to merge data and form. There are other tools available, but again, what you can use and what makes the most sense depends on your server setup.
After the data is merged, you need to "flatten" the form, so that it's no longer an interactive form (otherwise the user could use remove "John Doe" from the form and replace it with "Jane Doe"). pdftk can flatten the form as well.
The last step is just standard server technology, you save the form with the filename you need and the user can download it.
If this is not something you feel comfortable doing, you should hire somebody who can build this system for you. If you need more information, or help building this system, feel free to get in touch with me. My contact information is on my profile page.
Karl Heinz Kremer
PDF Acrobatics Without a Net
PDF Software Development, Training and More...
http://www.khkonsulting.com