Since I’ve used MS Outlook as mail tool to Send/Receive the email for my daily work. Actually, security for MS Outlook is a part strongly important not only for me but also for you all. I ensure that you did not want to leak any confidential data in Outlook like me. I will show you the way how to protect MS Outlook from unauthorized as below.
In this tutorial, I use MS Outlook 2013. Open MS Outlook at Windows Start
Right-click Outlook Data File > Data File Properties…
Click Change Password
Since this is the first time you set the password for Outlook so the Old Password field must be empty then input your New password and Verify password > Ok
Close MS Outlook then open it again and you will see MS Outlook have been protected by a password.
Nothing is too late, just do it now, setup password to Protect MS Outlook.
Hope it help, thank you for reading.