Lync 2013 with Office Communicator 2007

公司內是用 Communicator 2007，最近重灌把 Office 換成 2013 以後，
對話紀錄就不會自己儲存了.......

嘗試了一下讓 OC 2007 client 去跟 Outlook 2013 溝通，失敗
反過來讓 Lync 2013 去跟 OC 2007 Server 溝通，喔喔成了....
要改以下 regedit

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\IM Providers]
"DefaultIMApp"="Lync"

[HKEY_CURRENT_USER\Software\IM Providers\Communicator]
"UpAndRunning"=dword:00000000

[HKEY_CURRENT_USER\Software\IM Providers\Lync]
"UpAndRunning"=dword:00000002

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Lync]
"DisableServerCheck"=dword:00000001