I had some 32 bit clients, I had to keep the install software around to reinstall, since the newer versions only suppot 64 bit.
Glad to finally get those upgraded!
If you are really concerned, you should set up a test environment and test it yourself!
I can't speak to NetWare but I can confirm that 7.7.3 will still talk to and back up Windows servers running 6.5.6 (As to why not upgrade? Politics and ancient system stability ).
As you mentioned, you're on your own if anything does go wrong and make sure you have the 6.x client install files stashed in about a dozen places but they haven't broken backwards compatibility (yet).
I have Windows servers with NB clients back to the 5.x days.
As D_Flood says you're on your own but for some clients I cant get them current so you go with what works.
I had some 32 bit clients, I had to keep the install software around to reinstall, since the newer versions only suppot 64 bit.
Glad to finally get those upgraded!
If you are really concerned, you should set up a test environment and test it yourself!
I also have kept the old versions of the clients around. Once a new version comes out that removes the capability to push out the software for a client that is now unsupported you'll be glad you kept the old clients.
