When WarnerMedia launched its new expanded streaming service, HBO Max, earlier this year, HBO simultaneously stopped participating in Apple TV Channels. This meant that new subscribers could not sign up for HBO through Apple TV Channels, but existing subscribers could continue to access their subscriptions.
HBO appears to have flipped a switch today, however, that completely shuts off access to HBO via Apple TV Channels, including the ability to sign in using your Apple TV Channels subscription information.
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