Last related issue is if I want to change the Data File for an Existing Account to a New Outlook Data File. I can add the path though in the field and that will create the New Account using that You can select the mailbox items that you want to export. After adding Outlook files, mention Office 365 ID corresponding to the file name to migrate the file into the desired O365 account. When I add a New Email Account and select 'Existing Outlook Data File' for the 'Deliver new messages to:' option and click on the 'Browse' button nothing happens. Click on Add File(s) option to add Outlook single or multiple files or select Add Folder option to add a complete folder containing Outlook data files. When I add a New Email Account and leave the 'New Outlook Data File' selection checked for the 'Deliver new messages to:' option I get the same above error. I have tried opening Account Settings/Data Files, clicking on 'Add' and get this error - "An unknown error occurred, error code 0x80070003" I already have 5 Email Accounts setup, each with their own Data File, so this did work in the beginning.
Setup is Windows 7 Pro 圆4 - Office 2010 Standard Put your cursor in the Enter the object name to select box, type your computer username, and click Check Names. Click Change next to where it says Owner to change the owner of your selected file. Click the Security tab and then choose Advanced. I am trying to Add both an existing Data File (.pst) into Outlook to review the emails, and add a New Email Account with a separate Data File from the Default Outlook.pst File. Right-click your Outlook data file and select Properties.