I am having a weird issue w/ my calendar syncing. I am using BIS for my e-mail delivery and syncing my calendar w/ my desktop using the 4.5 desktop manager. When I first sync my calendar it shows that the meeting swere synced using my device default (desktop manger) however after I configure to have my two e-mail accounts come onto my phone it now shows my calendar as coming from one of the providers and not device default. Why is this? How do I get it to only show appts from device default and no other forms?
Got to Options -> Advanced -> Default Services on your device, set the email addresses you want to be default here *before* syncing any calendar items. I had this same problem when first upgrading to 4.5, my restored calendar entries attached to the wrong email account.