I keep getting errors in the logs every few minutes with the description "Error 0x80070003 occurred while rendering message 0001-000000003ab3 for download for user firstname.lastname@example.org." I've only received this error for two different users. Restarting doesn't work, and in the very little resources I could find online, everyone resorted to deleting the mailbox or reinstalling the virtual server. What could be causing this? I've deleted all the messages in one of the accounts and I'm still receiving this message. Additionally, it seems to be intermittent, it won't appear for a few days and then will start again.