First a bit ambigious on wether to ask for a new Sharepoint Topic group, or posting this question in RS or SQL 2012 groups, what's your opinion?
Anyway, I stumbled upon the need to change the CSV export file default behaviour to use comma (",") as the field delimiter, and instead use another sign (here: semicolon (";") but from other forum sites I have spotted need for the [TAB] sign as well as the [SPACE] sign).
In old 2008 RS server I found and changed the rsreportserver.config file found in \MSSQL\MSRS10.MSSQLSERVER\Reporting Services\ReportServer Folder (and not in the subfolder \BIN as stated in MS documentation) from:
<Extension Name="CSV" Type="Microsoft.ReportingServices.Rendering.DataRenderer.CsvReport,Microsoft.ReportingServices.DataRendering"/>
<Extension Name="CSV" Type="Microsoft.ReportingServices.Rendering.DataRenderer.CsvReport,Microsoft.ReportingServices.DataRendering">
and it worked as wanted.
But where do I do the same change in an Sharepoint 2010 RS 2008 R2 integraded server (where the SQL Server i separate from the webserver)?
I found the RSreportserver.config at the SQL Server instans server in a quite different folder location: C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\WebServices\Reporting\
And also - that file is quite different from the one in RS 2008 and doesn't have the CSV Extension attribute at all. Could I just add the whole shabang?