Originally Posted by golden422
I have had this happen twice, but I have no idea what caused it. I just re-added the account. It hasn't happened for a few weeks now.
The last two times that happened to me I noticed that I;ve set my "Period to sync Email" to "All" (under Settings>Accounts and sync>[exchange account]>settings...). Since then, I left it at "1 month" and the problem did not recur.
Previously: Samsung Omnia (July-Dec 08) | HTC Touch HD (Dec 08-Dec 09) | HTC HD2, (Dec 09-Mar 12) | Samsung Galaxy Tab GT-P1000 (Mar 11-Jul 13) | Galaxy Nexus (Mar 12-Dec 13)
Currently: Samsung Galaxy Tab 7.7 GT-P6800 (Jan 12-) | Nexus 10 (Sep 13-) | Nexus 5 (Nov 13-)