Why Did We Build It?

Default SharePoint list settings support intra-site lookup function but cannot meet end users' demands when it comes to looking up some information on other sites in the same site collection.

On the other hand, most Cross-Site Lookup can't be converted to default SharePoint Lookup column type so that many users feel inconvenience when they need to change content of Cross-Site Lookup column in datasheet view.

When users choose objects from dropdownlist of lookup column, they often have to scroll down through all the other objects. Find-as-you-type function is an enhancement tool for improving efficiency in the case of this problem.