Microsoft and Nokia are expected to announce a deal this week to put the mobile version of Microsoft Office on Nokia smartphones.
Stephen Elop, president of Microsoft Business Division, and Kai Oistamo, executive VP for Nokia Devices, could announce the partnership later today in New York, according to US media reports.
News of the deal has sparked speculation that Office 2010 will be put onto Nokia's Symbian S60 smartphone platform.
Analysts said the move would be a major strategic shift for Microsoft, which currently only makes Office for the Windows Mobile platform.
A partnership with Nokia will give Microsoft's productivity applications a boost by expanding to another platform.