ZyXEL Communications NSA-220 Plus User Manual page 294

Appendix D Importing Certificates
In the Certificates dialog box, click the Trusted Root Certificates Authorities
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tab, select the certificate that you want to delete, and then click Remove.
Figure 139 Internet Explorer 7: Certificates
In the Certificates confirmation, click Yes.
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Figure 140 Internet Explorer 7: Certificates
In the Root Certificate Store dialog box, click Yes.
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Figure 141 Internet Explorer 7: Root Certificate Store
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NSA-2401 User's Guide