This website is blocked by your organisation

Just to be clear: if you navigate to https://security.microsoft.com/cloudapps/app-catalog?tag=eq(Unsanctioned%2C) , you don't see "Microsoft Word Online" in the list?

There was an issue recently (DZ1231199) which, for us at least, resulted in a number of apps being unexpectedly tagged as "Unsanctioned" and blocked in Edge. Even once the issue was supposedly resolved, we had to manually remove the tags from the apps to restore access.