Update at 5:40 p.m.: Microsoft has confirmed his return.
A prodigal son is returning to Microsoft.
Microsoft confirmed his re-entry in an e-mail Saturday.
Moore, who had been heading Yahoo's media operations, left that job in November. At the time, Yahoo said that Moore was leaving to "pursue other opportunities." During his time-off, AllThingsD reported, Moore worked on a start-up idea and went on safari in Africa.
He will start back at Microsoft in mid-March and will report to Greg Nelson, general manager of MSN's global media group, Microsoft said.
Moore, who worked at Microsoft from 1995 to 2005, was the first publisher of Microsoft's online magazine, Slate, and had also been president of MSNBC.com.