Sign up for Office 365
Learn more about Office 365
Based on my test, we can install Outlook 2010 and Outlook 2013 on one computer. However, we can only open one Outlook client at a time. For example, if you have opened Outlook 2010, then when you open Outlook 2013, you will receive the following error message:
Therefore, I recommend you use one version of Outlook client at a time.
1 out of 1 people found this post helpful.