 <p>SSAS only accepts Windows auth. But you can close all Excel windows then start Excel from a command line like this:</p> <pre><code>runas /netonly /user:REALDOMAIN\YOURDOMAINUSERNAME "c:\path\to\excel.exe" </code></pre> <p>Then when it connects to Windows auth resources remotely it will connect as the user you mention in the runas command. </p>