Spanish lender CaixaBank will roll out 30,000 Nokia Lumia smartphones running on Windows Phone operating system, allowing simple integration with other Microsoft applications.
The bank, whose international business includes operations in London's Fleet Street, will provide staff with Lumia 925 smartphones during the first roll out phase, with the option to upgrade to newer devices in future.
The Windows Phone operating system will provide security and management features, such as encryption tools, isolation between work and personal applications, and embedded anti-malware protection.
Nokia and Microsoft will provide ongoing technical support for the smartphone deployment.
The Lumia handsets will integrate with Microsoft Office, and other Microsoft software tools, such as Exchange, Sharepoint and Lync.
"Thanks to the collaboration between all parties, we managed to deliver a customised solution for CaixaBank covering all their requirements and allowing us to manage it for the future in a coordinated way," said Reyes Justribó, general manager for Nokia in Iberia.
The bank said that the rollout is part of an ongoing project to support mobility amongst its workforce, and its customers.
CaixaBank recently revealed plans to tap into growing demand for wearable technology with the development of smartwatch and Google Glass applications.
Struggling phone maker Nokia, which has sold its mobile phone business to Microsoft, sold 8.2 million Lumia handsets in Q4 2013, around double the amount the year previously, but less than the 8.8 million in the previous quarter.