Hi Sonali,
First you have to find out who is applying for Visa for your company in AbuDhabi, Usually any company or individual in UAE can able to apply and process for Visit/ Transit visas. If anyone from UAE is ready to process visa for your employee you have to send his/ her passport copy, PP photo with white background, and the visa expenses.
If you don't have any contact person in Abudhabi, you can check with Abudhabi Immigration/ Airport Authority for visa applying. Pls check
www.abudhabi.ae for any clarifications.
Regards,
Arun Kumar M.J
0097150 1748009