SSAS Tabular Cube user and password error

Hi sgarces,

Firstly, when you add SSAS data source under Gateway, which username and password do you input? If you use a different account to sign in Power BI Service, and use Get Data to connect to the ssas data source, you would need to add this account in the Users tab of the data source under gateway in advance.

Secondly, please check that if the email address you use to sign in Power BI Service matches a defined UPN within the local Active Directory Domain. If a match cannot be found, the above error could occur, and you can use “Map user names” feature to solve this issue. For more details, please review this article: Manage your data source - Analysis Services.

Thanks,
Lydia Zhang