Hi,
I have found this topic, where is explained how to setup TO DO - Google calendar
but it does not show DUE DATE TIME DATE TIME as shown in your setup.
I cannot enter it manually neither does it automatically load from TO DO.
Thank you for your help.
Welcome to the Community 
The Due Date Time Date Time is a Microsoft To Do field so that’s why it isn’t shown in the setup example on Troy’s post which was just discussing how to adjust Date/Time values with modifiers.
Is the issue here that you’re wanting to modify the time in the Due Date Time Date Time field, but you’re unable to select that field in the Zap’s Google Calendar action?
If so, did you skip the test on the Microsoft To Do trigger and proceed to set up the Google Calendar action? Asking as it looks like the default test sample doesn’t provide the Due Date Time Date Time field which may be why you’re unable to select that field.
If that’s the case can you head back to the Test page on the Microsoft To Do trigger and change the test sample? That should hopefully then allow you to select the Due Date Time Date Time field in the Zap.
Looking forward to hearing from you on this!
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