When I click the Lync 2010 shortcut, the system try Icon appears for about 10 seconds then disappears.
I have to use Lync 2010 for work, I don't have access to any of the backend so can't make any changes.
Lync 2013 will allow me to connect, but has Exchange connection errors which prevents contacts from being obtained.
In Lync 2013 I'm also not able to create any new contact groups, or add contacts.