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https://blog.it-kb.ru/2019/06/11/sharepoint-2016-health-analyzer-the-server-farm-account-should-not-be-used-for-other-services-sptimerservice-sptimerv4-and-appfabric-distributed-cache/
SharePoint 2016 Health Analyser - The server farm account should not be used for other services - Сервисная учётная запись для служб SPTimerService (SPTimerV4) и Distributed Cache Service