Administrative and office management (AOM) plays an important role in supporting organizational operations, information flow, and managerial decision-making in modern enterprises. In the context of Viet Nam’s accelerating digital transformation following the COVID-19 pandemic, large-scale enterprises are facing increasing demands to modernize administrative processes, while empirical studies on this issue remain limited. This study evaluates Administrative and office management (AOM) practices at Enterprise X, a large beverage manufacturing company in Viet Nam, across three dimensions: records management, office facility administration, and information technology application. A mixed-methods approach was employed, combining questionnaire surveys of 86 administrative staff with participant observation and document analysis conducted during the 2020–2025 period. Data were analyzed using descriptive statistics and content analysis methods. The findings indicate that Enterprise X maintains relatively stable administrative operations, supported by experienced personnel and effective records management (4.07/5). However, several limitations were identified, including delays in document issuance due to the lack of standardized regulations (29.1%), insufficient interoperability among information technology systems causing data duplication (27.9%), and multitasking practices that reduce functional specialization (24.4%). The study concludes that Administrative and office management (AOM) effectiveness depends on the alignment of institutional frameworks, human resources, and technological infrastructure. Accordingly, several solutions are proposed, prioritizing records standardization and information technology integration to improve administrative efficiency in large manufacturing enterprises in Viet Nam.