Certificate Scanner for Whole Network?

We do a lot of Acquisitions and in those we have not payed close attention to what the servers have what Certificates and when they expire or who they were bought from.  Any free tools or methods out there that can scan and identify all Certs on all servers with Where they are from, when they expire etc..?  I used
"Digicert Discovery" but this did not pick up on everything.  Its picks up on about 2 of 5 Certs on each server in a certain Ip Range and I cant afford to miss any.
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Dave HoweSoftware and Hardware EngineerCommented:
if they are windows boxes, you might have better luck seeing what certs are installed in the keystore. With SNI solutions, an external scanner would need to know what domain to offer, and that doesn't include ldap (multiple ports), imap/smtp/pop3/anything, really that uses TLS.
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