OAuth2.0 is now support supported from Version version 6.8.0125.0512 of the Windows Logon agent. The process is as follows:
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Keep this window open and launch Windows Logon Manager on the machine which you installed the Windows Logon Agent on. (see see Configure Windows Logon Agent)
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Copy out the Client ID and Secret from the Agent Edit screen on the Admin console and paste into the OAuth Configuration box.
Click Click OK