Only unblock websites that you are certain are safe. If Symantec blocked the site due to a detected threat (like malware or a phishing attempt), creating an exception could compromise your system's security. Always investigate the reason for the block before proceeding.
Edit Your Policy: Right-click the existing Exceptions Policy and select Edit, or click Add an Exceptions Policy to create a new one. Add the Website Exception: Click on Exceptions in the left pane. Click the Add button and hover over Windows Exceptions. Select Web Domain. symantec endpoint protection unblock website
Malicious Reputation: The site has a history of hosting malware. Only unblock websites that you are certain are safe