4 Answers, 1 is accepted
You can easily set a maxlength attribute to the <input> element from which the Kendo UI ComboBox is created. Alternatively (if the widget is created from a <select>), you can set the attribute via Javascrript after initialization.
None of the Kendo UI input widgets have a maxLength configuration option - I am not sure where you have seen this. Since we rely strongly on native HTML elements, they allow setting such attributes in a standard way.
We can consider adding a maxLength option depending on customer demand. You can vote for it on our feedback portal.