In installing PeopleTools 8.50/HCM91, I noticed that PeopleTools began placing its Application Server configuration files in a different location.  Instead of finding them in %PS_HOME%/appserv, I found them at %USERPROFILE%\psft\pt\.  The culprit appears to be the PS_CFG_HOME environment variable. I found the documentation for this on page 30 of the Enterprise PeopleTools 8.50 Installation for Oracle (Task 1-5-7: Defining Server Domain Configurations).  I also just found a pretty good link in PeopleBooks about the settings. In order to fix my problem, I did the following:

• Shut the Application Server and the Process Scheduler Server down
• Configured the PS_CFG_HOME variable
  • Right click on My Computer
  • Choose Properties
  • Go to the Advanced Tab
  • Click on the Environment Variables
  • Add a new system variable
  • Enter PS_CFG_HOME for the variable name
  • Enter the path to the PeopleSoft Home directory for the value
• Copied everything from the %USERPROFILE%\psft\pt to the PeopleSoft Home directory.  There were several folders that it wanted to merge, but I didn’t see any files that it wanted to overwrite.  I skipped the peopletools.properties file because it was the same in both locations.
• Checked the value of %PS_CFG_HOME% in a Command Window.  If the value is not accurate, you might need to close the window and reopen a new one.
• Reconfigured the Application Server and Process Scheduler (I didn’t change any values, but this let it regenerate the configuration files)
• Booted the Application Server and Process Scheduler