Open the Preferences dialog box in Acrobat DC or Acrobat Reader DC:
Clicking any link to the Internet poses a potential security risk. Malicious websites can transfer harmful content or silently gather data. If you are concerned about these risks, you can configure Acrobat and Acrobat Reader to display a warning when a PDF attempts to connect to an Internet site.
You can allow Acrobat and Acrobat Reader to contact selected websites by adding their addresses (URLs) to your list of trusted websites in the Trust Manager preferences. Alternatively, you can allow all URLs. Follow the steps below.
Open the Preferences dialog box in Acrobat DC or Acrobat Reader DC:
In the Preferences dialog box, select Trust Manager in the Categories on the left and then click Change Settings.
The Manage Internet Access dialog box is displayed.
If the options in the Manage Internet Access dialog box are disabled, select Custom Setting. If options are still disabled, your product could be under an administrator’s control with those restrictions in place.
In the Manage Internet Access dialog box, choose from the following options:
Click OK to apply the changes.
Close the Preferences dialog box by clicking OK.
If you open a protected PDF and receive a prompt to allow or block a URL, select Remember My Action For This Site. This reply adds the URL to this list.
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