Over the eight months before March 2014, Tami Reller led Microsoft's Marketing Group, combining many distinct teams.

True: Microsoft's official announcements show that Tami Reller became head of the Marketing Group in the July 2013 'One Microsoft' reorganisation (about eight months before March 2014), which brought separate marketing teams together into one central group that she led until about March 2014. Mostly true: she led it but the start was 6–10 months earlier, or the consolidation detail is slightly different. Mixed: she shared leadership of the group (for example with a co-head) for that period. Mostly false: she led marketing only for a much shorter or longer time, or a narrower part of it. False: she did not lead Microsoft's Marketing Group in that period.

Set before the research began.

1. E1 One Microsoft: Company realigns to enable innovation at greater speed, efficiency - Source Microsoft News Center (Microsoft Source) · 11 July 2013 Own record

   “Marketing Group. Tami Reller will lead all marketing with the field relationship as is today. Mark Penn will take a broad view of marketing strategy and will lead with Tami the newly centralized advertising and media functions.”

2. E2 Microsoft hits the reorg button - CNET CNET · 11 July 2013

   “A new cross-company marketing group will be headed by Tami Reller, who is currently the chief of marketing and chief financial officer of Windows client and Surface.”

3. E3 Microsoft hits the reorg button - CNET CNET · 11 July 2013

   “And marketing and business strategy for all of Microsoft’s product lines is moving out of the individual business units and into centralized, cross-company groups.”

4. E4 It’s official: Microsoft sheds Bates, Reller from senior leadership team PCWorld · 3 March 2014

   “Chris Capossela is replacing Reller as chief marketing officer, while Penn is assuming a new role as the chief strategy officer, apparently leaving his former advertising and marketing duties by the wayside.”

Microsoft's July 2013 'One Microsoft' reorganisation memo (E1) and CNET's report the same day (E2, E3) show that Tami Reller was named head of a new cross-company Marketing Group. That group pulled marketing out of the individual business units into a central organisation, about eight months before March 2014. PCWorld (E4) reports that on 2014-03-03 Chris Capossela was replacing Reller as chief marketing officer, which supports her leading marketing until then. However, E1 also says Mark Penn would lead the newly centralised advertising and media functions together with Reller, so she shared leadership of part of the group. That makes the claim mostly true rather than fully true.