Changing the location or using a mail identity that is located on an external hard disk or a network is not supported. Like Microsoft Entourage for Mac 2008, Outlook 2016 for Mac and Outlook for Mac 2011 are intended to be purely locally cached mail clients. ~/Documents/Microsoft User Data/Office 2011 Identities Outlook for Mac 2011 caches your mail items in an identity in your home folder at the following location: ~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles Outlook 2016 for Mac caches your mail items in a profile in your home folder at the following location: Suggestion: It is recommended to take archive of Outlook 2016 data : To Archive Outlook 2016 data : Go to Tools > Export Option The Select Items: Mails, Calendars, Contacts, tasks, Journal Then manually save Data to any destination Location that you want. Additionally, using a mail identity or profile that is located on an external hard disk or on a network is not supported in either version of Outlook for Mac. We do not recommend that you change the default location of your Profile folder for Microsoft Outlook 2016 for Mac, or your Identity folder for Microsoft Outlook for Mac 2011 to an external hard disk or to a network.

Outlook for mac 2016 data file location