How to Undo Unsubscribe Action on outlook.com

So while going through outlook.com on my phone I accidentally clicked "unsubscribe" for a domain that I use a lot and definitely don't want to unsubscribe from.

Now from what I can tell I am still subscribed to the domain. I'm assuming this "feature" simply access the "Unsubscribe" link within the email, but in the case that extra confirmation or a valid user session is required the unsubscribe actions won't work. This is fine by me as the emails are still coming in.

The problem is now whenever I access an email from said domain on my phones outlook it says "You have unsubscribed from <domain>. Delete old messages?" At the top with a huge delete button. One misclick and all my messages for that domain get sent to the deleted folder.

This is an absolutely ridiculous inconvenience and shouldn't even be an issue at all. However no matter how much I search online I cannot find ANY way to revert the "unsubscribe" actions within outlook.com. No I am not looking to revert the unsubscribe on the target domain, that's fine. I want the "You have unsubscribed from <domain>. Delete old messages?" message for the target domain to disappear from outlook.com. However I cannot find a single option anywhere to manage this.

Any help would be much appreciated! Thanks