HTML Anchor <a/> in Event detail

I added an anchor () as part of an event’s detail to allow the users to navigate to another url. When users try to edit the event by pressing “Save” in the lightbox, they get the
following exception:

A potentially dangerous Request.Form value was detected from the client (lead_name="<a href='NewLead.asp…").

Could you please provide so guidance how to get around this error?

This is default reaction of ASP.NET validation to any html in the post data. This problem is well described at stackoverflow, please check this post … the-client