On June 16 the Zune Services will be down for maintenance. So no Zune Social, Zune.net forums or Zune Marketplace at that time. At the same time Xbox Live will be off for maintenance too. This means that Xbox Live and the ‘My Xbox’ section of Xbox.com will be unavailable, and the Xbox.com forums will be read-only. The rest of Xbox.com will be available with limited interruptions.
The maintenance will start at 12:01AM PST and can last for up to 24 hours.