When I use a certificate to sign a document, clicking sign does nothing.

Hi KWooper,

Thank you for reaching out, and I’m sorry to hear about your experience.

I see that you’ve already tried some troubleshooting steps on your end. There could be various other factors to consider:

- Did you check if the issue occurs with any other document? It may be a file-specific issue. Try creating a blank test PDF and see if you can add a digital signature.
- Where is the file saved? Is it stored locally or on a network drive?
- Try creating a new digital signature to see if that works. You can follow the steps outlined here: https://helpx.adobe.com/acrobat/desktop/protect-documents/manage-digital-ids/create-self-signed-id.html.

If the above suggestions do not resolve the issue, you may want to reinstall the application using the following steps:

1. Remove the application and run the cleaner tool (https://www.adobe.com/devnet-docs/acrobatetk/tools/Labs/cleaner.html).
2. Reboot your machine.
3. Install Adobe Acrobat from this page: https://helpx.adobe.com/acrobat/kb/acrobat-dc-downloads.html. 

Please let us know how it goes, or if you need any help.

Thanks,  
Meenakshi

I have also tried this:

 I went to Edit > Preferences > Signatures > Creation & Appearance.  And took the following steps:

1.  Ensured the Default Signing Method was set to Adobe Default Security
2.  Signing Format set to CAdES-Equivalent
3.  Made sure all boxes were unselected.  Unselected "Include signature's revocation status"
4.  I changed "Enable Review of Document Warnings" to "Never"
5.  I changed "Prevent Signing Until Warnings Are Reveiwed" to "Never"
6.  I deselected "Use modern user interface for signing and Digital ID configuration.
7.  I then created a signature under "New" 

This failed