Acrobat DC Installation on Windows TS / Citrix fails with Errorcode 8

Hello *all,

i'm trying to install Acrobat DC on a Citrix Server.

Following the documentation

https://www.adobe.com/devnet-docs/acrobatetk/tools/VirtualizationGuide/citrix.html

I have to execute the following command:

setup.exe /sALL /msi ROAMIDENTITY=1 ROAMLICENSING=1

I'm logged in as local administrator on the machine

I tried "runas" and other ways to lauch the file with elevated priviledges, but whatever i do, i get the following message in PDApp.log:

06/17/21 15:38:28:450 | [INFO] | | ASU | MSIInvoker | MSIInvoker | | | 10964 | Build Version - 1.16.0.1
06/17/21 15:38:28:450 | [INFO] | | ASU | MSIInvoker | MSIInvoker | | | 10964 | Logging Level verbosity Set to 4
06/17/21 15:38:28:450 | [INFO] | | ASU | MSIInvoker | MSIInvoker | | | 10964 | Showing the Commandline syntax help and Returning ...
06/17/21 15:38:28:450 | [INFO] | | ASU | MSIInvoker | MSIInvoker | | | 10964 | Commandline Usage :
06/17/21 15:38:28:450 | [INFO] | | ASU | MSIInvoker | MSIInvoker | | | 10964 | setup [--silent] [--ADOBEINSTALLDIR=<TargetInstallDirPath>] [--INSTALLLANGUAGE=<ProductInstallLanguage>] [{-h, -help, --help}]
06/17/21 15:38:28:450 | [INFO] | | ASU | MSIInvoker | MSIInvoker | | | 10964 | setup must be launched with elevated privileges.
06/17/21 15:38:30:123 | [INFO] | | ASU | MSIInvoker | MSIInvoker | | | 440 | Temp path found for log files (C:\Users\ADMINI~1\AppData\Local\Temp\3\\CreativeCloud\ACC\PDApp.log)
06/17/21 15:39:06:806 | [INFO] | | ASU | MSIInvoker | MSIInvoker | | | 10964 | Setup exiting with return

code (8)

When i just call setup.exe with no parameters the installer runs.

What am i doing wrong?

What is the correct syntax to execute the command with sufficient priviledges?

Thank you very much in advance!

Stefan