My Outlook inbox is suddenly getting a ton of spam and I don't know how to stop it

EXACTLY!!!!!!!

MS will not listen to anything else but a class action IMHO

I think if enough users consider taking part in a class action MS might pay attention to the problem

I have spent the last hour going through junk/spam emails as I do most mornings now.

I go through each one and using the subject header, I go into "rules" and apply the "subject or body includes" and then the action to delete. No point adding the email as this changes every time. I know the subject heading changes slightly too in most cases. A dot here and so on. I also report every email to MS via the "select all" and report.

Now, I do know this is a complete waste of time as it does not work. The exact same subject headings are getting through, so now I add an action (before the delete action) to forward the message to Microsoft Support, I don't want to give the email on this site but it easy enough to get if you have been in contact with them and had a response..

I have no idea if this will work but I really want MS to go through the pain we are all going through with the ridiculous amount of junk emails we are getting...

Not much, unfortunately. I had a user (btw I'm a mail administrator) who suddenly got a ton of spam. I changed her email address. There is nothing much you can do when spammers target your mailbox with thousands of email every hour. Out of the thousands, a few will go through, guaranteed.