Hello Oliver,
If I understood correctly you would like to perform a remote validation. I am afraid that currently the Kendo validator does not support such functionality, however we will appreciate if you submit this as a feature request in
the user voice forum. Thus way we would be able to monitor the interest in the idea and if it turns out to be popular we will consider its implementation in one of the future versions.
Currently the only possible way is by
async: false Ajax requests. Kendo depends on jQuery v.1.7.1 so you may consider using this version (where the option is not deprecated) instead of 1.8. In case you are wondering how to create a custom Kendo validation rule, please check the
corresponding component documentation as well as the
validator overview article.
Kind regards,
Alexander Valchev
the Telerik team
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