PowerShell Script to get All Alerts of all Users from a specific SharePoint Online Site Collection, including subsites: https://github.com/VladilenK/PowerShell/blob/main/reports/Site/Fetch-All-Alerts-from-SPO-Site.ps1 https://raw.githubusercontent.com/VladilenK/PowerShell/main/reports/Site/Fetch-All-Alerts-from-SPO-Site.ps1 based on Salaudeen Rajack:“SharePoint Online: Get All Alerts from a Site Collection using PowerShell“