I've started getting this error whenever I startup Outlook 2010. I've tried recreating my account (after deleting the profile) using the autodiscovery method and manually. In both cases I can create the account. The first time I log in, then everything works but without fail the second time I get the error. I've tried changing the cache settings on the account too but to no avail. I've looked through the forum and followed these other ones but my problem is never fixed. I am running Outlook 2010 on two computers (one at home and the other at work). The one at work does not have this problem so it is just the computer at home.
Here are the other posts I have looked at:
http://community.office365.com/en-us/forums/160/p/3216/11687.aspx#11687
http://community.office365.com/en-us/forums/160/p/20693/97298.aspx#97298
http://community.office365.com/en-us/forums/160/p/4471/17144.aspx#17144