Recipients unable to open and verify digitally signed Outlook emails

If sending digitally signed emails from Outlook to recipients that do not have the CoSign Root CA installed on their computers, recipients will need to run the CoSign Trial Root CA in order to validate those emails. The CoSign Trial Root Certificate can be obtained by running a one-time software package available via CoSign Nation. To run the software package, please visit CoSign Nation and hit the red "Download" button. This one-time action ensures that subsequent signed emails will validate properly.

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