Read this in a thread by @matwalaboy and think its worth reposting here for those following this thread that might have missed it.
There is a new workaround to be able to play the single player campaign for free on your XBOX during the multiplayer free access week. Here are the steps (with thanks to mydealz and @Andorphine ): Download the game, this installs the full game (Multiplayer, Zombies, and Campaign). You can checks this under installed games and add ons. File size should be ~93GB. Make XBOX your home console: Settings > General > Personalisation, and then select My home Xbox. GO OFFLINE! Settings > General > Network settings > check GO OFFLINE. Start the game. You should now be able to start and play the full campaign. It's really important that you are offline. You must not let the game connect to the COD servers.
There is a new workaround to be able to play the single player campaign for free on your XBOX during the multiplayer free access week. Here are the steps (with thanks to mydealz and @Andorphine ):
Download the game, this installs the full game (Multiplayer, Zombies, and Campaign). You can checks this under installed games and add ons. File size should be ~93GB.
Make XBOX your home console: Settings > General > Personalisation, and then select My home Xbox.
GO OFFLINE! Settings > General > Network settings > check GO OFFLINE.
Start the game. You should now be able to start and play the full campaign. It's really important that you are offline. You must not let the game connect to the COD servers.