Planner group email address blocks external emails

[Jennifer Wallace]

I have an employee who has been using the Office 365 web portal to access his email. He only relies on the autocomplete feature to track his contacts.  Is there a way to export the autocomplete files from the webportal and import them either into Outlook itself or into his Contacts?

[#2]

Outlook and OWA use different "caches". There is no native method to export the OWA cache, however you can use EWS as detailed for example here:  http://gsexdev.blogspot.bg/2013/10/exporting-suggested-contacts-owa-auto.html