Adaptation processes of migrant religious communities are frequently examined in the scholarly literature, yet these examinations often remain confined to specific domains of inquiry, for instance focusing narrowly on legal frameworks, integration policy demands, or administrative compliance. Such compartmentalized discussions risk overlooking how these communities experience pressures that cut across multiple spheres at once. This paper investigates the adaptation trajectories of migrant religious communities under the weight of overlapping demands and expectations: How do communities navigate overlapping demands from host-country politics, legal regimes, internal governance, and transnational ties to former homelands? To address this overarching question, I begin with a synthetic literature review that integrates findings and concepts from political science, the sociology of religion, legal studies, religious studies, and ethnographic research, bringing these strands into conversation rather than treating them as isolated bodies of knowledge. Drawing on this interdisciplinary synthesis, I develop a comprehensive analytical framework that enables a holistic approach to the development, adaptation, and contestation within migrant religious communities, paying attention to institutional rules, social practices, and cross-border influences. This framework is then applied to the case of Islamic migrant religious communities in Austria, a context marked by dense regulation, vibrant public debate, and intricate transnational linkages. Austria constitutes a highly complex empirical setting that becomes significantly more intelligible when approached through a multi-disciplinary lens, allowing us to illuminate how legal, political, organizational, and transnational pressures intersect and shape concrete strategies of adjustment, negotiation, and resilience.