This study concerns the adoption of Information Communication Technology (ICT) services in libraries. The study collected 445 usable data from university library end-users using a cross-sectional survey instrument. It develops, applies and tests a research model of acceptance and use of such services based on an existing UTAUT model by Venkatesh, "et al." (2003). Results show that "relevance" and "social influence" have significant effects on intentions to use e-library services. Results further show that university communities in Uganda are inclined to use electronic library services due to social demands, relevancy of services, available facilitating conditions and benefits they expect from the services. Most importantly, the Service Oriented Unified Theory of Acceptance and Use of Technology (SOUTAUT) model explains 57% of variance towards acceptance and use of e-library services.