There are a couple of ways one could find the EUM Config SharePoint site:
From EUM Admin
This is the easiest way to reach the EUM Config site provided one is either EUM Manager or Global Admin.
- Login to EUM Admin and click the link to the EUM Config site
- This will load the EUM Config site
From EUM App Service in Azure Portal
- Navigate to https://portal.azure.com and login with Admin credentials
- Navigate to the EUM App Service
- In the left hand menu, click Configuration
- In the Configuration page that opens, lookout for "EUM_Suite:ConfigSiteURL" and click to open the details.
- The details will have the EUM Config SharePoint site URL in the value field