Hi Harricat,
I am afarid @btconnect.com email address cannot be upgarded to IMAP, they can only be used as POP email accounts.
If you require an IMAP email address you can order Office365 for small business which will give you an exchange mailbox with IMAP funtionality, but this product cannot be used with an @btconnect.com email address, it has to be used with a domain name for domain name email addresses.
Markp
The question would appear to be 'Why so?'
Surely imap is the default setting for business (large or small) users across multiple access points?
I've been using btconnect mail for seven years, and it's a continuing problem.
Moving over to a 365 address means considerable upheaval, informing several hundred customers, suppliers, website and account logins etc. Is BT so impervious to the needs of its smaller customers...? Or are they so busy buying mobile networks they have lost sight of the basics?