Outlook 2007 won’t close properly after installing Lync

This issue actually presented itself in a unique way. A user was complaining of issues with her NK2 file (the file that saves the addresses of intended recipients of email drafted in Outlook). Reviewing the file, I could see that it hadn’t been changed since about 5 months previously, which is when Lync had been installed. Whenever Outlook would be closed, it would remain running in the background and not close properly, preventing any new writes to the NK2 file.

Luckily this is easily repaired, and is a known issue.

Simply enable logging in Lync (through Settings > General > Enable logging). This will allow Outlook to close properly and should solve any associated issues.