What to ask when taking over external servers?

At $WORK, I'm going to be taking over the administration of four servers that currently do stuff for a variety of researchers scattered around the province. There are a number of players here:

The owning agency has also ponied up for an upgrade to the four servers; I'll be taking delivery some time next week.

I've got some preliminary information -- what the servers do, how the users use the thing, etc -- but I'm preparing a more detailed plan. In the meantime, I've compiled a list of questions for my local contact.

In the middle of that, it occurred to me that this would be a good discussion topic. Have I missed anything? Let me know!