I would like to know when Content filtering type data source intelligence service license expired.
If Intelligence Service license is expired you wont be able to do categorization of new website. However, if you have old database it will function normally till it expiry date.
To understand what expiry date you currently have, go to Configuration > Content Filtering > Bluecoat, then select Intelligence Service
You will see a similar view to the following, which indicates database expiry date and time: