Update Ticket description

Update Ticket description

Need help asap.

I am trying to update description and found out i cant send html formatted string in xml.
Its failing.

 
https://desk.zoho.com/api/xml/requests/updaterecords?authtoken=..........&portal=.....&department=.....&xml=<?xml version='1.0' encoding='UTF-8'?><response><row no='1'><fl val='Description'>'asdf asdf asdf /nasdf <u>asdf asdf/n</u>asdfasdf<font size="5"> asdf asdf asfd /n</font>asdf asdf&nbsp;/nasdf/n'</fl><fl val='Status'>Closed</fl><fl val='Read Status'>False</fl><fl val='is Spam'>False</fl><fl val='Thread Count'>0</fl><fl val='Priority'>Low</fl><fl val='Is Overdue'>False</fl><fl val='Is Escalated'>False</fl><fl val='Classification'>Problem</fl><fl val='Happiness Rating'>0</fl><fl val='Comment Count'>0</fl></row></response>&id=.....