To manually add a site to Internet Explorer's Trusted Sites security zone:

1. Open Internet Explorer.

2. Use the Tools menu to open Internet Options.

3. Select the Security tab.

4. Select Trusted sites and press Sites.

5. Type the full URL into the Add this Web site to the zone box, unless it is already auto-entered, and press Add.

6. Press Close (or OK) and OK.

NOTE: See How can I use Group Policy to add a site to the Trusted Sites zone?