I've have other issues re: MAPI > Outlook too.
Occasional issues in Outlook where the PDF is not present at all in the email but is present on the webmail side.
Biggest issue, which I posted on the forum today: sometimes when an email is replied to or forwarded, the original copy of that email disappears in Outlook, present in Webmail.
Trouble tickets submitted for all problems. I was told they would look at the problems but was not provided a 'fix' timeline per se.
To me these are major issues in Outlook functionality I hope that they would want to fix ASAP---especially where emails 'disappear.' When emails 'disappear' users start to question the service. I just switched over to smartermail thinking that MAPI was working so we'll see how fast they can correct.