Enterprises in various sectors execute digital transformation (DT) projects with a significant impact on their business and information technology (IT) architecture. The enterprise architecture management (EAM) function is designed to support these transformation endeavors. As DT projects are increasingly customer- and partner-driven, business-oriented and based on innovative digital technologies, the requirements for the EAM function are expected to change. With our case study, we investigate the changing requirements and potential new challenges associated with adapting and advancing the EAM function. This case study was conducted at one of the largest mobility service providers in Europe. Based on a case study grounded in expert interviews, we identified 39 changed and new requirements and compared them with requirements presented in the literature. The findings present new and changed requirements for adapting the EAM function to better support DT projects and to structure them according to EAM domains.