Open MSN Messenage and click onto "Always sign in as" and selet "Appear Offline" from the "drop-list"
I think this feature is only available with MSN 7, so you may need to update it if you are running an older version.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.