Task: Open the Outlook App, Go to the Setting, Click on the dbwscratch.test.id6@outlook.com then click on the Remove Account to Sign Out the mail.
Steps:
Open the Outlook App
Click on the Overflow Menu Home Icon in the top left corner of the screen 
Click on the setting Icon in the bottom left corner of the screen 
Click on the dbwscratch.test.id6@outlook.com
Swipe up the screen to see the remove account button 
Click on the Remove Account Option to Sign out the mail 
Select the Remove option to confirm sign out the mail