Can you please provide the complete and full details so that the members can give the most appropriate and accurate suggestions? A few gaps need filling up:
1. What sector is your company in—manufacturing, services, telecom, etc.?
2. What do you mean by "showing absent for a long time"? "Long time" can mean anything depending on who decides the meaning.
3. Was this issue discussed with the employees concerned? If yes, what were the results or reasons given by each of them? If no, why not?
4. What is your locus standi/position in the whole matter?
5. What has been done so far about this issue by the company's management? If nothing, why not?
There's a quote: "If you want the right answer(s), you have to ask the right question(s)"—hope you got the point.
Regards,
TS