Removing Suggested Accounts in New Outlook

Until Microsoft adds a straightforward way to delete addresses from the suggested accounts list, you can try the steps below to remove addresses from the Suggested accounts list.

When I tested it, it removed Microsoft consumer and business accounts that were no longer on my computer. But it did not remove accounts I'm using in Outlook and OneDrive.

Step 1:
Close new Outlook. If it is running when you do the following steps, the addresses won't be removed.

Step 2:
Remove the accounts from Windows Settings > Accounts. Look under Email and under Work or School accounts. Remove or disconnect the accounts. Note: removing accounts here will sign you out of the account in Office and OneDrive.

Step 3:
After removing the accounts from Windows Settings, you need to delete the contents of this folder:

C:\Users\%username%\AppData\Local\Microsoft\OneAuth\blobs

Step 4:
Using Notepad, open each file in the following folder. Look for the email address for the account you want to remove. When you find a file with the address in it, delete the file.

C:\Users\%username%\AppData\Local\Microsoft\OneAuth\accounts

Tip: open Notepad on one half of the screen, the folder on the other half. Drag the files to notepad to view.

Step 5:
Finally, delete all the files in this folder:

C:\Users\%username%\AppData\Local\Microsoft\IdentityCache

Step 6:
Open new Outlook and open the Add account dialog.