1) service tag goes to "empty" sometimes due to status updating/refresh (can't get it yet) I thought that was normal behavior for when a follow up discovery can't actually connect...
2) these 2 machines are not EMPTY as per the others (which do not cross connect like this). This service tag field IS returning some sort of data that is null or unrecognized character as it reads as a different entry in the dB than the EMPTY. Like it is a space character or something. See screen capture that shows a filter for EMPTY and a filter for " ". using the Auto-detect your service tag on Dell.com it also comes back with a sort of "blank" entry. It doesn't error like I have had some or time out or fail... it finishes it and populates the dialogue and when you click OK, it says "cannot be blank"...
3) wasn't sure about the port 443 whether it was pertinent or not. Looks like not. Configuring WSMAN for the iDRAC is down the road...
4) Website check on dell.com support shows 7.3 as the appropriate version for other 2003 boxes (was 7.1 one until a bit ago and 7.2 for 2008)
5) Yes they have OMSA installed.. hence "OMSA for each machine shows" statements...and multiple statements about OMSA versions..
6) Definitely not. motherboards are OEM.