Like any other internet service,
Xbox Live occasionally experiences interruptions. Any time Xbox servers go offline, certain functions and connectivity options will be limited. Times like those are when the Xbox Live 0x87DD0019 error will appear alongside a message explaining that you can’t sign in. Fortunately, this error does have a very simple fix, but it’s not one you’ll need to perform on your own.
Xbox Live 0x87DD0019 Error | Can’t sign in
The Xbox Live 0x87DD0019 error code appears when there’s an Xbox Live service outage. The system will say you can’t sign in, and will advise you to try again later. Unfortunately, the only way to resolve this error is to wait for the Xbox team to fix the problem causing it.