Choosing a Certificate User
When searching for a digital signatures, you can search for documents that have been signed by, or not signed by, specific users. For instance, you could search for every document signed by "John Smith". Alternately, you could search for every document that has not been signed by "Jane Doe".
If more than one certificate has the same certificate subject, that subject will only be listed once, and searching will return all signatures for that subject. If a certificate is not stored in the Certificate Store, its certificate subject will not appear in the list.
To select a user in the Choose Signature User dialog, select a user from the list and click OK.