Hello Jagadish,
I have reviewed your query and I totally understand your concern regarding the permissibility of sharing the article of some other author in your groups. Here, I would like to provide you with some bits of advice, that might help you out.
As per the Copyright Act, of 1957, every author has some exclusive rights over their work. These rights include the right to reproduce, distribute, or communicate the work to the general public. If you want to share the article with the author’s name in other groups, then it may seem permissible but the fact is that it should be of fair use and should be done with explicit consent of the author.
If you copy and share the article, even if it has the attribution, this will infringe the copyright of the author if it has been done without the permission of the author. However, limited sharing might be permissible under the principle of fair dealing if it has been shared only for educational or informational purposes. This has been explicitly mentioned in Section 52 of the Copyright Act, of 1957. But still, I would like to let you know that it must be done with proper caution.
Hence, at last, I would like to suggest you seek consent from the authorv and let him know for which purpose, you are using the article. Please refer to the case of Eastern Book Company v. D.B. Modak, (2008) 1 SCC 1 for a better understanding of the concept.
I hope I was able to make things clear for you. If you need further clarification, please feel free to connect with me on LinkedIn.
Thank You.