Hi,
I've got Electrum set up on my main PC (Windows) and linux laptop.
Both installations are set up to use the same wallet and I've checked that the receiving addresses are the same on both computers.
When I start sending and receiving I understand it's good to generate a different address every time, if possibe. Does that mean that my laptop wallet will automatically sync changed addresses if I don't log into it for a month and I use the Windows one on a daily basis?
Electrum wallet is deterministic. So, wallet with the same seed will generate the same series of addresses.