A Microsoft online analytical data engine used in decision support and business analytics, providing the analytical data for business reports and client applications such as Power BI, Excel, Reporting Services reports, and other data visualization tools.
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Open SQL Server Management Studio to log in
Establishing a fresh login for the NT Service MSSQLServerOLAPService.
determining the memberships for the db_datareader and db_datawriter roles.
Also try to change the account.
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