The agency has been set up jointly by Next Fifteen and its subsidiary August.One Communications specifically to handle the account.
The Inferno team is staffed entirely by former workers from August.One's sister agency Bite.
This includes Bite associate director Grant Currie, who heads the Inferno team, senior account manager Suzy Sammons and senior account executive Caroline Rabjohn.
According to August.One CEO Stuart Handley, it is hoped two further staff can be recruited to bring the team up to five.
Inferno won the account following a four-way pitch, understood to have been against incumbent Hill & Knowlton, Citigate Technology and Weber Shandwick. The pitch process was carried out separately from Microsoft's main agency roster.
Speaking to PRWeek at the time of the pitch, Business Solutions PR manager Sarah Perkins said the PR focus would be on the trade press.
A key message is to raise awareness of what is a relatively new division, as it has been formed to house two acquisitions - Great Plains, which Microsoft brought two years ago, and Navision, which was taken over last year. The division's focus is on services designed for SMEs.
The Inferno team reports to Perkins.