Installing R5 Software over R4
In the section earlier in this chapter about performing a dry run, I suggested that you use an R4 administrative Notes client to view the Public Address Book on the first R5 server after you bring it up. If you did that, you would see that you can't administer R5 servers from a Notes R4 client. It's worse than that—you can't administer any servers in your domain from an R4 workstation after you've upgraded one server to R5, because you can't read certain documents in the R5 Public Address Book except from an R5 workstation.
The point here is that you shouldn't upgrade any servers in your production Notes domain just for the fun of it. If you want to play with R5, set up a separate test domain just for ...
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