Microsoft is killing off the use of its Metro design name to describe a tiled interface in Windows Phone and Windows 8. We brought you news of the change earlier today, but a tipster has provided an internal memo sent to Microsoft employees confirming the move. In it, Microsoft reveals that "discussions with an important European partner" led to the decision to "discontinue the use" of the Metro branding for Windows 8 and other Microsoft products — one that employees must adhere to immediately.

The Windows team is "working on a replacement term" according to the memo, "and plans to land on that by the end of this week." Until then, employees have been advised to refer to the Metro style user interface as the "Windows 8 style UI." The memo was distributed to employees earlier this week, so we expect to hear official news about the Metro replacement by the weekend.

Microsoft has used the Metro branding as a codename for its typography-based design language. The company has used a number of elements from the design language across its Windows 8 and Windows Phone products, as well as the recently released Office 2013 preview.