Hi There, I am new to Exchagne administration and learning as I go. The person that administered Exchagne prior to me has notifications setup for when errors occur. Yesterday I started receiving the following error: Webmail has reported an error. Reported status is: Queues - Unknown Drives - Error Services - OK Memory - Unknown CPU - OK I have checked the queues and all looks ok. I have checked the event logs and everything looks ok, EXCEPT I am consistantly getting Active-Syncerrorson one mailbox. I don't know if the errors and the above notification are related since it appears the errors have been occuring for a while and the above error just started yesterday. I am running Exchange 2003 in Windows Server 2003. If I have left out anything please lett me know and I will try my best to answer any questions. Thanks in advance for any help that anyone can provide. Debbie

Hi,The cause of the issue is theHeapDecommitFreeBlockThreshold has not been set to 262144, please correct it by implement the steps as below link:http://technet.microsoft.com/en-us/library/aa998162.aspxhttp://technet.microsoft.com/en-us/library/aa995632.aspxThanksAllen