I have changed a bit in my script to try something.

Now the code looks like this.
code:
  $sDatabaseSource="\\FS1\Profiles$$\groups\sintas\data\"
  $sDatabaseDestination="\\fs1\randers-reb$$\userdata\"+@USERID+"\addon\"
  If Not Exist($sDatabaseDestination)
	Copy $DatabaseSource $sDarabaseDestination /s
	"error: " @error get $nul
	ENDIF
	$sintasreg = "HKCU\Software\Add-On Products\exchange central\paths"
	IF KEYEXIST ($sintasreg) = 0 
	 ADDKEY ($sintasreg)
	ENDIF
	 IF (WriteValue($sintasreg,"DefaultDatabase","\\fs1\randers-reb$\userdata\"+@USERID+"\addon\","REG_SZ") <> 0 ) 
	  ? "Warning KIX: Error status @error (@serror)"
	ENDIF
         IF (WriteValue($sintasreg,"UserData","\\fs1\randers-reb$\userdata\"+@USERID+"\addon\","REG_SZ") <> 0 ) 
	  ? "Warning KIX: Error status @error (@serror)"
       ENDIF
  ? "sleeping"
sleep 10
the result of this is

error: 78
_________________________
One by one the Pinguins came and took my sanity away.