Configure Service Accounts (Analysis Services) | Microsoft
https://docs.microsoft.com/en-us/analysis-services/instances/configure-service-accounts-analysis-services
In a failover cluster, all instances of Analysis Services should be configured to use a Windows domain user account. Assign the same account to all instances. See How to Cluster Analysis Servicesfor details. Standalone instances should use the default virtual account, NT Service\MSSQLServerOLAPService for the default instance, or NT Service\MSOLAP$instanc…
In a failover cluster, all instances of Analysis Services should be configured to use a Windows domain user account. Assign the same account to all instances. See How to Cluster Analysis Servicesfor details. Standalone instances should use the default virtual account, NT Service\MSSQLServerOLAPService for the default instance, or NT Service\MSOLAP$instanc…
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