The default path to the Server Manager temporary folder is <Installation folder>\Bin\RecognitionServer2Temp. The current folder location can be viewed and changed in the Recognition Server Properties dialog box.
The path to the Processing Station temporary folder is <Installation folder>\Bin\ProcessingStation2Temp.ABBYY Recognition Server does not allow changing the location of this folder (however, this is usually not necessary, because the Processing Station gets only a few image files at a time, which doesn’t consume a lot of disk space).