Apple has released Server Admin Tools 10.7 to provide compatibility with Mac OS X 10.7 Lion Server. Included are updated versions of Podcast Composer, Server Admin, Server Monitor, System Image Utility, Workgroup Manager, and Xgrid Admin. (Free, 193.25 MB)
Wake On Demand in Snow Leopard
Putting your Mac to sleep saves power, but it also disrupts using your Mac as a file server, among other purposes. Wake on Demand in Snow Leopard works in conjunction with an Apple base station to continue announcing Bonjour services that the sleeping computer offers.
While the requirements for this feature are complex, eligible users can toggle this feature in the Energy Saver preference pane. It's labeled Wake on Network Access for computers that can be roused either via Wi-Fi or Ethernet; Wake on Ethernet Network Access or Wake on AirPort Network Access for wired- or wireless-only machines, respectively. Uncheck the box to disable this feature.
Server Admin Tools 10.7
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Special thanks to Richard Stanley, Jim Kranias, J K Luckenbach, and
LeRoy Blank for their generous support!
I regularly use either Server-Admin and Workgroup Manager to manage my servers. One of them still being 10.5 Leopard.
Server-Admin works fine with Leopard Server, however Workgroup Manager cannot attach to Open Directory on Leopard Server. So you cant administer a Leopard Server with a computer running Lion. Hint: Use Screen Sharing and a local instance of Workgroup Manager on the server.
Even worse, although not able to connect, simply trying to connect leaves the LDAP Database in a state not writeable. Users can still authenticate, but you cant apply changes. The LDAP Database went back to operational by the next reboot. If this does not work for you, you should become familiar with db_recover which did the trick for me whenever something went wrong with Open Directory.
There is no notice regarding system requirements on the Apple site which I regard being a poor job.
Honestly, I'm not getting warm fuzzy feelings about Lion Server from what I'm seeing online. I'd approach any Lion Server upgrade very cautiously.