It's understood 500 Jobs will be created in a newly established Microsoft Sales Centre and a further 100 are being made available across other areas including finance, operations and engineering.
Taoiseach, Enda Kenny is due to travel to the company's Dublin campus for this morning's announcement, accompanied by Minister for Jobs, Enterprise and Innovation, Mary Mitchell O'Connor and the IDA's Martin Shanahan.
Microsoft first opened its doors in Ireland in 1985 with a small manufacturing facility employing just over one hundred people.
It now employs over 1,200 full time employees and 700 full-time contract staff.
