Public IM Connectivity
Public IM Connectivity enables York St John University users to
connect and collaborate with any Microsoft-based messenger address
(@live.co.uk, @hotmail.com, etc) in exactly the same way as
other Yorksj Lync users.
To add a Microsoft email address as a Lync contact simply type
the email address in to your 'Find a contact' box,
right-click on the contact and choose 'Pin to Frequent
Contacts'.
Once you have done this the contact you have added will receive
a notification to let them know you have added them as a
contact. They can then choose to add your contact address as
a contact in their respective Messenger application.

Supported public IM domains
The following is a list of currently supported public IM
domains:
AOL
aol.com
icq.com - As of June 10, 2011 ICQ was disconnected pursuant to AOLs
sale of ICQ to Digital Sky Technologies (DST).
love.com
mac.com
MSN (Windows Live)
br.live.com
hotmail.co.il
hotmail.co.jp
hotmail.co.th
hotmail.co.uk
hotmail.com
hotmail.com.ar
hotmail.com.tr
hotmail.es
hotmail.de
hotmail.fr
hotmail.it
hotmail.ch
live.at
live.be
live.ca
live.cl
live.cn
live.co.in
live.co.kr
live.co.uk
live.co.za
live.com
live.com.ar
live.com.au
live.com.co
live.com.mx
live.com.my
live.com.pe
live.com.ph
live.com.pk
live.com.pt
live.com.sg
live.com.ve
live.de
live.dk
live.fr
live.hk
live.ie
live.in
live.it
live.jp
live.nl
live.no
live.ph
live.ru
live.se
livemail.com.br
livemail.tw
messengeruser.com
msn.com
passport.com
sympatico.ca
tw.live.com
webtv.net
windowslive.com
windowslive.es
Click here
for Known issues that occur with public instant messaging and
Communications Server.