In the urgent quest to combat climate change, decarbonization of office buildings takes on a paramount role due to their significant contribution to global carbon emissions. Experts argue that the best approach towards decarbonization lies in harnessing digital technology. The integration of smart systems, AI-driven analytics, and IoT sensors into building management can not only reduce energy consumption but also optimize operations for sustainability.

The rise of smart buildings signifies a transformative step in this direction. Such intelligent infrastructure uses real-time data to control lighting, heating, ventilation, and air conditioning (HVAC) systems efficiently. Additionally, AI algorithms can predict and adjust resource utilization based on occupancy patterns, weather forecasts, and energy pricing fluctuations, thereby minimizing the carbon footprint.

Building automation systems (BAS) illustrate another digital technology pillar essential for decarbonization. By centralizing control over various subsystems within a building, BAS ensures optimal performance and energy conservation. The coupling of BAS with green-energy sources like solar panels furthers these efforts by replacing traditional carbon-based electricity with renewable alternatives.

Moreover, the collection and analysis of big data facilitates informed decision-making and leads to more sustainable building designs. Through lifecycle assessment (LCA) tools, architects and engineers can anticipate the environmental impact of buildings and incorporate materials and methods that contribute least to carbon emissions.

Digital twin technology also emerges as a frontrunner in office building decarbonization. These virtual replicas simulate real-world buildings and enable stakeholders to visualize outcomes of different energy-saving measures before actual implementation. Digital twins serve as a testing ground for innovation without the risk associated with physical alterations.

In conclusion, digital technology indeed stands out as the best approach for decarbonizing office buildings. From smart systems to big data analysis, the digital domain offers tools that are indispensable for creating greener, more efficient structures that align with environmental goals. As these technologies continue to evolve and become more accessible, it is imperative that industry leaders accelerate their adoption to ensure a sustainable future for all.