Internal communication is an important and indispensable component of each business organisation or company. Effective implementation of activities encompassed by internal communication significantly affects the overall implementation of communication strategies and the success of communication objectives. Educational institutions have a multiple social role. In addition to educating new generations and hence providing the foundations for social progress, they are both the promoters and the frontrunners of positive trends. Consequently, they continuously face the challenges imposed by development of new technologies and tools intended to promote and accelerate communication, which encourage them to make systemic adaptations. Such challenges are even more prominent in private educational institutions in which both the target and the potential public are simultaneously also the internal public and communication activities and the strategy itself need to have dual meanings and purpose. The effectiveness of such specific and very complex communication can be qualitatively and quantitatively presented through the results of the survey questionnaire conducted in target public. Through anonymous and objective answers to questions, the respondents can be completely sincere and assess the quality of internal communication, harmonisation of objectives and the potential of the business organisation, as well as the readiness for adjustment to actual trends and point out the real needs and wishes of their target public. Moreover, the results of this research show the effectiveness of the selected communication channels, perception and strength of the sent communication messages and the noticeability of systematically managed internal communication by the communications department, as well as all the other representatives of the specific business organisation and teaching and administrative staff.