Hi Srinidhi,
Find below format for your reference, I think 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 again like to extend a warm welcome to Mr.XXX along with his family to be a part of the ( Company Name) family.
Looking forward for a prolific association with Mr.XXX.
Best Regards,
XXX