Office 365 ProPlus install - should we remove Office 2013 Home and Business first?

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We have multiple users, including myself with Office 2013 Home and Business. In addition, I have Visio Pro 2013. We are trialing Office 365 E3 right now, wanting to demo the Lync features especially.

 

When I went to install Office 365 ProPlus from the My Apps page, the ClickToRun app started and then eventually after streaming for about 2 hours simply froze.

Rebooting didn't help and I was forced to Uninstall all Office 2013 apps using the following KB article's "fix it": http://support.microsoft.com/kb/2739501#Method1

 

My question is:

Is there a proper rollout for getting users that already have Office 2013 (either the full suite or individual apps like Visio) upgraded/migrated to Office 2013 ProPlus with the E3 plan of Office 365?

Is it going to require uninstalling existing Office 2013 suites/apps on their PCs before running the installer on the Office 365 site? Or, should the Office 2013 ProPlus be able to upgrade/replace the existing Office 2013 suites/apps on a user's PC?

 

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