hey all! i had a server on a remote location running for months. OS is/was Server 2012 OEM. legit bought. for whatever reasons - i decided to upgrade to R2 i did download the ISO file with the name 'SW_DVD9_Windows_Svr_Std_and_DataCtr_2012_R2_64Bit_German_-2_Core_MLF_X19-31421' from Microsoft Volume Licensing Service. i did not remember the server using an OEM Server 2012, i simply ran setup - all fine no warnings 20 minutes later R2 up and running. some days later, i did check some things and there i see "windows has to be activated" - but wont accept my OEM key (vl iso) fubar - now i can travel to the remote location and re-setup w12 from scratch ? does anyone have any ideas ? how to roll back / change version / ... ? THANKS!