Certificate Signing

[huge321]

I have generated a signing certificate, but it shows the following:

Signed by CN=My Name,OU=Users,O=Example Organization,C=US (certificate issued by C=US,O=Example Organization,OU=Headquarters,CN=PDF-CA, expiring Sat Dec 20 10:23:17 CST 2014)

How do you change "Example Organization" to our company name?

When opening a signed document in acrobat, it shows this as an invalid signature.

[Florent_Guillau]

Have you read the documentation and the section about Setting up the Local Root Certificate?