I have been using Outlook 2010 and Lync on my PC for quite some time and have what I assume is a healthy environment supporting 400 users.  Recently we have seen an issue popping up on PC's where for no apparent reason integration between Lynch and Outlook 2010 goes missing.  Calendar and presence information is still working, but the ability to IM Reply or see the presence indicator in Outlook next to people's name is gone.

You can read their contact card and see photo's, just no program type integration.  If you try ti IM a person it says "To use this feature, sign on to an instant messaging program".

We have tried uninstalling and reinstalling Lync and also removing users roaming profile.

We cannot find a fix and I could use some help.

• Moved by Max MengMicrosoft contingent staff Tuesday, May 08, 2012 1:37 AM Moving to a more appropriate forum (From:Office IT Pro General Discussions)

There has been a workaround that has worked for me all the time - start MS Lync first followed by MS Outlook, it works! Alternatively, if both are already running then simply restart MS Outlook and it will work!

Funny, but it works!

I am still looking for the actual cause and permanent solution to this issue.