Geo-fencing allows you to control access to your account based on geographical locations. It enhances security by restricting login attempts from outside the designated areas.
The following steps will allow you to define Geo-fencing,
1) Login to accounts.zoho.com
2) Once logged in, navigate to security and choose Geo-fencing --> setup Geo-fencing
3) Choose the preferred country and choose whether you want to allow or restrict access from the selected countries.
4) Next, choose the sign-in type for which you want to apply this restriction and click enable
Geo-fencing works based on the IP address and if you have connected with a VPN to a country which is not in the list of allowed locations, you won't be able to access your account.