In Outlook 2007 I click Tools > Account Settings and then go to the Data Files tab. The current Default mail box is Personal Folders. Above it is my IMAP mail box. I want to switch the Default mail file from Personal to the IMAP one but when the IMAP one is selected the "Set as Default" option is disabled.
How do I enable this option and switch to IMAP as the default?
Best Answer
This is not possible.
The way IMAP is implemented in Outlook it does not support IMAP as a default default data file.
This is because the IMAP protocol is only designed for the storage of e-mails. Outlook needs to store other types of objects like contacts, notes, appointments etc. which (officially) are not supported by the IMAP protocol.
AFIK only .PST files, Microsoft Exchange accounts and a couple of third-party groupware accounts (via add-ons) can be be used as the default "Message Store" (that's how the data file is called internally).