This study aimed to examine the effect of customer experience dimensions i.e., comfort, security, and usability, on customer happiness, the effect of customer experience dimensions and customer happiness on e-government portal success, as well as the effect of customer happiness as a mediator in the relationship between customer experience dimensions and egovernment success. This study adopted a quantitative approach. The sample consisted of 400 users of TAMM, the Abu Dhabi egovernment portal, were selected through stratified random sampling technique. The Covariance-based Structural Equation Modeling (CBSEM) using IBM SPSS AMOS software was utilised to test the hypotheses. The findings revealed that all the customer experience dimensions, namely comfort (β=0.318, pvalue=0.001), security (β=0.289, p-value=0.001), and usability (β=0.310, p-value=0.000) have significant effects on customer happiness at a significance level of 0.05. The effect of customer experience dimensi.....

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