Thank you for getting back to us.
1) Unfortunately in the current version there is not there is no direct server API to set the drillDown node but you can set it from the server to a hidden field value and perform it from there on load as for example it is done in the the code below:
radOrgChart = $find(
$ = $telerik.$;
fieldValue = $(
Hope this will help you solve the issue. If you have further questions please don't hesitate to contact us again.
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