Certificate Errors

New Here ,
May 14, 2022 May 14, 2022

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I'm a help desk staff member and I assisting helping a large bank of computer users. I've been assigned the task to troubleshoot an error message that I see when launching Adobe Reader DC. The message will keep repeating itself, no matter what I click, therefore Adobe Reader DC is unusable.


This certificate cannot be verified up to a trusted certificate authority.
Issued to: adobe.io
Issued by: <not sure if I can publish this information>
Valid from 7/29/21 to 7/31/22


Around 4-5 years ago, my work did block all ".IO" websites. We had a lot of gamers come in, using .IO sites for online multiplayer gaming and it was causing a massive disruption. Once blocked, the problem largely subsided.


Is the "*.IO" block causing the error message?


Other than trying to figure out how to add exceptions, is there a way to deploy a certificate via our Windows 2016 Server? Clients are on Windows 10. The Server 2016 was updated for Windows 10 policies.

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Security digital signatures and esignatures

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Community Expert ,
May 16, 2022 May 16, 2022

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It's possible that's causing issues. When I go to "adobe.io" it redirects to "developer.adobe.com".

You might want to add an exception to your *.io filter to let those requests proceed.

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New Here ,
May 16, 2022 May 16, 2022

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Problem is, is that my immediate boss is telling me that's not possible because it would affect company wide, not just at my building's location.

Is there another way?  Yes, I did type in adobe.io from a station that wasn't blocked by .IO sites and was re-directed to developer.adobe.com

Is there a registry key I can change to maybe put in a different address to get the certificate from?

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New Here ,
May 16, 2022 May 16, 2022

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Or is it possible to locally redirect my PC's adobe.io request to another site via some other means?  I'm not sure, maybe host file?

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Community Expert ,
May 16, 2022 May 16, 2022

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Sorry, I don't have answers to these questions. You will need to talk to someone in Adobe about that.

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