An Outlook 2010 update was released the week of August 11 2015. Note that this update requires you have Microsoft Office 2010 Service Pack 2 installed.
After sending a saved email message, the attachment in the email message is lost and not sent. This issue occurs if you set the DisableBgSave registry key and the email message contains an inline image in a signature.
When you right-click on an email message from a distribution list and select to create a rule for email messages from the distribution list. When you receive an email message from a member of the distribution list, the rule does not work as expected.
When you access certain IMAP mailboxes, Outlook 2010 crashes occasionally.
The Filter and Conditional Formatting buttons are disabled in the Advanced View Settings dialog box after searching for a contact.
When you send an email message from a mailbox without the "Send As" permission, you receive an NDR with nondescript error message that resembles the following: This message could not be sent. Try sending the message again later, or contact your network administrator. Error is [0x80070005-00000000-00000000] instead of an NDR that says you don’t have permission to send on behalf of the address.
When you receive and then accept a proposal of a new meeting time for a meeting, the meeting time is not updated to the proposed time, but stays to be the original time.
When you try to move items from a primary mailbox to an online archive mailbox, you receive the following error message: Cannot move the items. Cannot move or copy the folders. Cannot move folder. A top-level folder cannot be moved to one of its subfolders. Or, you may not have appropriate permissions for the folder. To check permissions for the folder, right-click the folder, and then click Properties on the shortcut menu.
When you use the MAPI over HTTP protocol to connect to an Exchange account, if the protocol is changed to the RPC protocol or the RPC over HTTP protocol, the primary mailbox is not displayed. This issue occurs after you install the June 9, 2015, update for Outlook
For a complete list of all bug fixes in this month’s update, see August 11, 2015, update for Outlook 2010 (KB3055041)