Connected to office wifi network, but cant access internet - eviltoast

Hello,

I have a office laptop which is connected to the office wifi network using user ID and password and I can connect to the official accounting software as well as the internet. Now, to make things faster, i have brought my personal laptop to connect to the same wifi network; but here I can connect to the official accounting software but not the internet. Why is this happening? What changes should I do to my personal laptop so that I can connect to the internet as well?

Thanks in advance