[Error Code] 0x8004010f [Relevant Links] PST requirements [Explanation] 
This issue can occur when the user conducting the migration has insufficient privileges to access the PST, or when the tool is otherwise unable to find or access the PST file. Note that the Google Apps Migration for Microsoft® Exchange tool requires both read and write access to the PST. If this happens for a root folder in the mailbox in an Exchange migration, then it's usually a permission related issue and you should check whether the specified admin user has full access on the end-user mailbox. In a few cases, we observed that the legacy user had some problems and recommended creation of a new admin user, grant them full MBA on all the end-users, migrate and then remove that admin user.