Adobe install DUO certificate

Step 1

Open a file which should contain a certificate from DUO.
The blue bar at the top of the file warns about a not validated certificate.

Click on Signature Panel on the right side.

Step 2

Right click the certificate that is shown on the left side.

Step 3

Click Show Signature Properties.

Step 4

Click on Show Signer’s Certificate….

Step 5

Open the tab Trust.

Step 6

Click Add to Trusted Certificates….

Step 7

Click OK.

Step 8

Tick the box Use this certificate as a trusted root and click OK.

Step 9

The DUO.nl certificate should now be installed in Acrobat Reader.

Step 10

How do I choose a default application to open my files?

Last modified: 22/01/2020