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The email notification can have an embedded URL which takes the approver directly to the approval page. This should be configured automatically during setup but if it’s not, do this:
Go to the Azure dashboard, resource groups, PhisherCat.
Find the Function App with a name that begins with PC-PS.
Once in the Funciton app, click on Configuration, click New application setting and call the setting PhisherCatDashboardUrl and give it the value where your dashboard hostname is, excluding any ? parameters