Link IEEE Xplore article with its arXiv version in Google Scholar After submitting a paper, I uploaded it on arXiv, to give it immediate visibility. 
After a few months (more than six months), the article has been accepted and finally published on IEEE Xplore. However, Google Scholar only shows the arXiv version, without pointing to the IEEE one.

How can I manually make Scholar recognize the presence of the published paper?
Google Scholar will eventually find the IEEE version of the paper. Just give it some time.

See the last item of the "coverage" page of the Google scholar FAQ and the second item of the "search tips" page.