We have setup 2 exchange accounts on outlook 2010 and on one of them it fails to send email with error:
Task 'firstname.lastname@example.org - Sending' reported error (0x8004010F)
: 'Outlook data file cannot be accessed.'
It does receive email but not send. If we re-create the pst file/account it works for a couple of days and then it fails again. We setup the account as online/not cached and still same issue.
We run mailbox scan against the affected exchange account and did not find any issue.