Dates that you enter in the Reporting column of a report can only be entered in the English (United States) date format in the Enterprise Desktop Virtualization tool
When you try to run a report in the Microsoft Enterprise Desktop Virtualization tool, the dates that you enter in the Reporting column of a report can be entered in the English (United States) date format only.
For example, you cannot enter the date in the dd.MM.yyyy format.
We have a workaround in the form a new Knowledge Base article here:
KB978555 - Dates that you enter in the Reporting column of a report can only be entered in the English (United States) date format in the Enterprise Desktop Virtualization tool
Hope this helps,
J.C. Hornbeck | System Center Knowledge Engineer