Outlook – Pressing Ctrl + Shift aligns text right in Outlook and Lync

This Microsoft article discusses this same issue:
Information about using 2007 Office suites and programs on a computer that is running another version of Office.

In general, Office 2007 can coexist with earlier versions, but Oulook apparently cannot :

Multiple versions of Outlook

Microsoft Office Outlook 2007 cannot coexist with any earlier version of Microsoft Outlook. When you install Outlook 2007, the Setup program removes Microsoft Office Outlook 2003, Microsoft Outlook 2002, and Microsoft Outlook 2000. The Setup program removes these versions of Outlook even if you click to select the Keep these programs check box in the Removing Previous Versions dialog box.

Your problem is that the copied text arrives with its formatting, which should be stripped. There are products that do that, and some browsers support a "copy plain text" operation or extension, but the simplest solution is to modify that option in Outlook.

From Copy and Paste in Outlook Without Messing Up Your Formatting :

Go to Outlook Options => Mail Format tab => Editor Options => Advanced, then scroll down a little ways to the Cut, copy, and paste options. Drop down each option and select "Match Destination Formatting" or "Keep Text Only".

I don't have Outlook 2010, so cannot judge how easy it is to get to these options.