I would like to add this morning I have also ran through the steps located here to ensure NSS is working properly.  The drives are available and mounted.  I used nssmu to dismount all volumes and then remounted them, unfortunately my guess is these drives will continue to no map correctly because when I go into file explorer and navigate to these drives on the network and then try to access them I get a message that says - "Windows cannot access" and when I hit the diagnose button to see what windows will find it tells me windows cannot find the top level domain name.  Which this is strange behavior because no other servers in organization are having this issue at any other location.

The fastest way to getting this resolved is to open a case if you have those available.

Checking LDAP is a good start, though I don't think that test will tell you if the cert is expired.  JXplorer tends to be a bit more helpful, and/or to test that cert directly with the command;
openssl x509 -inform pem -noout -text -in /etc/ssl/servercerts/servercert.pem
which will show that cert's Validity date range.

checking the /var/log/messages file for errors/fails is a good thing to spotting that first fail

make sure eDir is up on the box, easy enough to test with
ndsrepair -T
to see that it sees the servers it should

General LUM troubleshooting is the next step following TID 7002981  with additional bits in the OES Docs

on the server, can you cd to /media/nss/VOLNAMES  and within those volumes?