Receive error when you press F9 to send and receive e-mail in Outlook 2007 & Cached Exchange Mode:

You use Cached Exchange Mode in Microsoft Office Outlook 2007. Additionally, you use the DownloadOAB registry value to prevent the automatic download of the offline address book (OAB). When you press F9 to send and receive e-mail messages in all Outlook accounts, Outlook unexpectedly tries to download the OAB. Additionally, you receive the following error message:

TASK 'Microsoft Exchange Server' reported error (0x8004010F) : The operation failed. An object could not be found.

To resolve this problem, apply hotfix 939596. Additionally, you must turn off the option to download the offline address book before you press F9.

Reference: For more details refer this KB article and how to obtain the hotfix to resolve the issue.

Error message when you try to synchronize Outlook to a Windows Live Hotmail account: "Error with Send/Receive"

You use the Microsoft Office Outlook Connector to synchronize Microsoft Office Outlook to a Windows Live Hotmail account. If the synchronization fails after several attempts, the synchronization process stops. Additionally, you receive the following error message:

Error in Mail. Error with Send/Receive. http://g.live.com/1OLC12URL/SyncLimit

This issue occurs if the Windows Live Hotmail account cannot currently be synchronized. To avoid saturating the synchronization limit for the account, the Outlook Connector preemptively stops the synchronization process.

Reference: For more details refer this KB article to find the workaround to resolve the issue.