Cannot run SQL Agent Analysis service command against server alias

Question

Hi,

I seem to have everything working except running a SSAS Tabular cube refresh from SQL server based on a ALIAS name.

SQL Server 2019, DNS & SQL Server alias configured to use CubesDEV alias.

• First test, connected with SSMS support SupportDEV to the analysis services CubesDev. This works fine.
  
• Manual refresh started from SSMS. This works fine
• Created a credential and proxy to use as the run as in a SQL server Analysis Services Command
• Added credential user to Server Administrators role (I now high level but is for testing now)
• Created a SQL Server Analysis Services Command job step to refresh database

{
  "refresh": {
    "type": "automatic",
    "objects": [
      {
        "database": "C"
      }
    ]
  }
}

• Used real servername SRV001
• Started job, works fine
• Changed job step to use server alias CubesDEV do get error:

• And more like this text.

The basic question is: Why can I connect to the SSAS Tabular instance based on real and alias server name with SSMS and run the proces cube. Can I also do this in a SQL agent job based on the real server name but not based on the server Alias?

Regards,

Arjan