To check the version number of Microsoft Outlook 2013, you can do as following:
Step 1: Open outlook email client.
Step 2: Click the File > Office Account, and then click the About Outlook button.
Step 3: You can see the Outlook version.
Check Outlook Version Number In Outlook 2010
Step 1: Open outlook email client.
Step 2: Click the File > Help, and you will see the version number in the About Microsoft Outlook section.
Check Outlook Version Number In Outlook 2007
Step 1: Open outlook email client.
Step 2: Click Help > About Microsoft Office Outlook, and you will get the version number in the popping up dialog box.