Signing In and Out of Yahoo! Music Unlimited
The Yahoo! Music Jukebox will automatically recognize you as a Yahoo! Music Unlimited subscriber when you sign in from the homepage or other locations. To sign in, click the Sign In button at the top left on Yahoo! Music Jukebox pages. If you wish to sign out, click the Sign Out button. You can then sign back in with another user ID.
Periodically the Yahoo! Music Jukebox may require you to sign in if you have a Y! Unlimited subscription in order to update your song files.
If you install the Yahoo! Music Jukebox and run Y! Unlimited on a machine other than the one on which you began your subscription, you will need to sign in again on that machine. Note that you can download Y! Unlimited subscription music on a maximum of three machines at any given time. Beyond three machines, you can only access your music by streaming.
Signing in with two IDs when using Messenger Music: If you have more than one Yahoo! ID and you sign in to Yahoo! Music Unlimited or the Yahoo! Music Jukebox with one, and Yahoo! Messenger with another, your music collection from one ID will not be available to share using Messenger Music with the other. You must be logged in to Y! Unlimited and Yahoo! Messenger with the same ID to share your songs. If you should be signed in with two different IDs, you will see a message alerting you of the situation.