The most reliable method is to log into Outlook.com on your mobile browser (or a desktop computer) and follow the steps listed in Method 1 . The changes will sync to your mobile app instantly.
Unfortunately, the Outlook mobile app does not currently offer a direct list of blocked senders within the app settings. To unblock someone on mobile, you have two options: how to unblock an email address on outlook
The web version is the most common way to manage account settings. This process applies to Outlook.com, Hotmail, and Live accounts. The most reliable method is to log into Outlook
Select "Mark as Not Junk" or "Move to Inbox." This usually alerts Outlook's filters that you want to receive mail from this person again. how to unblock an email address on outlook