During the installation of RPU iTM 8.0 by an non-administrative user admin credentials are requested. Further installation without admin credentials is not possible, in spite of the fact that the settings for non - administrative users were configured in: iTM Server -> Updates -> Installations.

As above.

Tetra, Dimetra, iTM 8.0 and older, RPU

The feature is available from iTM 8.1. 

The user of older versions must deliver the administration credentials.