CRM Upgrade - Marketo Impacts

Hey guys!

We will be upgrading our CRM to 2016 and I have some questions on how to make sure the integration with Marketo will remain working properly.

I read the CRM upgrade process here: https://nation.marketo.com/blogs/marketowhisperer/2015/08/10/gotchas-in-upgrading-microsoft-crm-instance-when-integrated-with-Marketo

And it says to verify the Dynamics URL. How can I make sure the urls in Marketo will stay as they are and will not change? Has anyone done this upgrade? Is there any other areas I need to verify prior/after the upgrade to make sure we do not have any bad surprises once the upgrade is been launched?

Thank you all for your help!

Emma