You can set the resolution of the image at the time of exporting from Lightroom however, that depends on the image quality if it is good enough.
Resolution is often misunderstood in digital photography. The only way to increase resolution is to have more pixels. Can you please explain in a little more detail what it is you are trying to do?
How big is the image that you have, in pixels?
What does your "high resolution" image need to be?
This is the image I am trying to get to high res. The woman I am dealing with through the company has said "the artwork you have provided is low resolution and will not print. I will need vector artwork such as an AI or EPS file with all text converted to outlines, If you are not able to provide vector artwork I can also use PDF files or JPEG files but they have to be high resolution files."
I'm obviously new at this and have no clue what she means when she says vector artwork or AI or EPS files.
What are the pixel dimensions of the image?
What file format is the image?
How large does the finished image need to be?
Will the finished image be printed or will it be displayed electronically?