In a statement released to TechCrunch Nokia noted:
The vast majority of people in the building are working on Devices & Services related activities, so the building will become a Microsoft site. This is still targeted to be finalised in Q1 2014. People who will work for Nokia post-transaction will relocate to a building nearby that Nokia already owns. This building is currently being renovated in Karaportti, this is a campus we have had for many years. Of course, all regulatory approval will have to be in place prior any personnel movement.
While the news is not unexpected and makes sense in terms of logistics, it is still a concreate example of the impact of the Microsoft Nokia deal in Nokia's home market and will have an emotional resonance for many people.
Microsoft has already stated that it does not intend to make any major changes to where work is carried out. Finland will, de facto, become Microsoft's new devices hub, although major device development work will also continue to be carried out in China and San Diego.