Outlook 2010 Error 0x800CCC9). This started suddenly overnight on two different accounts. These accounts feed into one inbox, I don't know how this happened when the program was first set up almost 2 years ago. This works out fine for me though. Called ISP who confirmed all settings correct and they weren't having issues. Also an account on that domain with a different login on another computer works fine. I tried adding a new profile and that works fine. Outlook also has about 12 folders for old mail, etc. All data from Outlook totals 7.98 Gbs. The main Outlook file total is just under 2 Gbps. The mail files also have about 15 folders of various sizes that mail is moved into on an on-going basis.
Additional: The account continues to receive mail during the error message.