Beware the Ides of March: new date for end of Messenger
Some have a tough time w/ change & acting accordingly in a timely manner when change does come. So fair warning... the only date I have been able to find is March 15th for Messenger ending. It is being replaced by Skype. Right now, installing Skype & signing in to it w/ a Microsoft Acc't lets both Messenger Contacts & Skype Contacts be listed. You might consider switching over to Skype before the 11th hour.
There is a Skype APP in the MS Store. There is, also, still, Skype for Windows (Desktop) found @ www.skype.com