Advanced technology has affected all aspects of life, including education. Technology in education has proven effective in several topics, including learning ESL/EFL. By reviewing previous research, the study aimed to explore the effects and challenges of using Microsoft Teams as an online learning tool on EFL learners at Unaizah, Saudi Arabia, from the students’ point of view. To improve their speaking skills more efficiently than in traditional classrooms, a questionnaire as a descriptive approach was used to collect data. The sample consisted of 351 female students. The results indicated that learners find using Microsoft Teams has advantages in improving English speaking skills. Thus it had a positive impact. Furthermore, the study found that learners face challenges in using Microsoft Teams. Moreover, there are no statistically significant differences at the level of the significance (α ≤ 0.05). The study recommends that educational institutions apply Microsoft Teams for its advantages.