Hi Srinidhi,
Find below the format for your reference; I believe it will be helpful for you.
Regards,
Bharti
WELCOME TO <company name>
Dear All,
We are pleased to inform you that Mr. XXX has joined us as (Designation) in (Department) at (Company Name) (India).
On behalf of (Company Name), we heartily extend a very warm welcome to Mr. XXX as part of the (Company Name) family.
Mr. XXX has joined us on (Date, Day).
We would like to extend a warm welcome to Mr. XXX along with his family to be a part of the (Company Name) family.
Looking forward to a prolific association with Mr. XXX.
Best Regards,
XXX