Remove user registration on SharePoint 365

How to remove a user registration from Office 365 SharePoint.

Useful for renaming a user or removing a user in order to reuse an email address.

Go to a site in your collection, Click the settings cog/Site Settings.

Under Users and Permissions, click People and Groups.

Click on any of the groups.

Go to the end of the current URL and change the GroupID to 0 (zero).

This will show you a list of all users and allow you to remove the user from the site collection from the Actions menu.

Server 2012 R2 RDS Farm RemoteApp not working externally

So, I've just had one of those RDS breakthroughs.

The domain is dedicated to RDS to host an application externally in Azure.

Two DC's Two RDHosts, where to put the Connection Broker and Gateway? The DC's obviously, right? Wrong!

It turns out after much troubleshooting that YOU CANNOT USE A DC FOR RD CONNECTION BROKER.

If only that was made clear.