CRM for Outlook Client Upgrade 2011 to Question

In the next few months we will be upgrading our MS Dynamics from 2011 to 365.  Currently, with out 2011 install we use the CRM2011 for Office Outlook client and the Set Regarding feature to track correspondence to projects.  When we move to 365 and also upgrade the Office Outlook client on workstations, will this affect any emails that have the Set Regarding set on them?  Will the tracking be broken and need to be setup again?

Thanks,

Patrick