How to get the Azure AD Tenant ID without PowerShell

A quick way to get the Tenant Id for your Office 365 / Azure AD tenant is to login to the Azure AD Portal, drill down to the directory and copy the ID from the URL.

https://manage.windowsazure.com/teamtelstra.onmicrosoft.com#Workspaces/ActiveDirectoryExtension/Directory/<Tenant Id>/directoryQuickStart

How to get the Azure AD Tenant ID without PowerShell