
Can i do that by opening a VF page by clickiing on the link?
If yes, is it possible to do without user logged in on Salesforce?
Plese help me on this.
Thanks,
2 answers

Thanks for the answer Vinay, But i have an issue here,
I have a field in custom object having lookup relationship with User object with some filter options.
and when i am updating the record through VF page(having controller logic), using "update <CutomObject>", it will update the whole record and simultaneously check the filter of the lookUp filed too.
But if i m using VF(site) as a guest user, it wont allow to update the record , as it is asking for "Authorization Required".
Can we update the record through VF(site), if there is an dependency of a filter option(lookup Field) in your record.
OR there is any way that i can able to update a particular field in a record without updating the whole record through controller logic.
Please help.
Thanks,