AGOL > Enable Esri Access vs. My Esri > Set Permissions:
Let's take "E-Learning" as the example:
...First of all, if these two Accounts are Linked, is it by the 'Username', the 'E-Mail' or 'combination'?
If Accounts are Linked, which of these, or both, need to be set to get E-Learning access?
If the Accounts are separate (NOT Linked), which one, or both?
And what specifically about E-Learning is being accessed? ...Because someone with NO Account can access it.