The Exchange Team released the first Update Rollup for Exchange 2010 SP3. Exchange 2010 SP3 RU1 is available for download from the download centre as update 2803727.
This is build 14.03.0146.000 of Exchange 2010. Article 2803727 has the full details for this release.
Probably the two biggest changes that we have been waiting on are:
2814847 Rapid growth in transaction logs, CPU use, and memory consumption in Exchange Server 2010 when a user syncs a mailbox by using an iOS 6.1 or 6.1.1-based device
2822208 Unable to soft delete some messages after installing Exchange 2010 SP2 RU6 or SP3
You can find a previous blog about the soft delete issue here.
In addition to this, there is a fix for the move mailbox issue in Exchange 2010 SP2 RU3+
“Post-move cleanup failed. The operation will try again in 30 seconds”
2763065 Move request log is logged when you move a mailbox in an Exchange Server 2010 SP2 environment
Exchange 2010 DAG AllowCrossSiteRPCClientAccess Reverts to False is resolved in SP3 RU1.
2561346 Mailbox storage limit error when a delegate uses the manager's mailbox to send an email message in an Exchange Server 2010 environment
2729954 Can't send voice message to a selected non-primary email address in an Exchange Server 2010 environment
2750846 Information Store service crashes when you mount public folder databases on an Exchange Server 2010 server
2751628 Event ID 9682 does not record the folder name when you delete a public folder in an Exchange Server 2010 environment
2756460 You cannot open a mailbox that is located in a different site by using Outlook Anywhere in an Exchange Server 2010 environment
2777742 Address Book service crashes on an Exchange Server 2010 Client Access server when a server has been running for 25 days or more
2781488 RPC_S_SERVER_UNAVAILABLE (0x6BA) error code when you use a MAPI or CDO-based application in an Exchange Server 2010 environment
2782683 Email message that a user sends by using the "Send As" or "Send On Behalf" permission is saved only in the Sent Items folder of the sender in an Exchange Server 2010 environment
2784210 Ethical wall does not function as expected when the ReportToOriginatorEnabled property is disabled in an Exchange Server 2003 and Exchange Server 2010 coexistence environment
2793348 Read receipt is sent unexpectedly when you view an email message by using Outlook Web App
2796490 Microsoft Exchange Information Store service crashes on an Exchange Server 2010 Mailbox server
2802569 Mailbox synchronization fails on an Exchange ActiveSync device in an Exchange Server 2010 environment
2806602 EdgeTransport.exe process crashes on an Exchange Server 2010 Hub Transport server
2814723 Server loses network connectivity and UDP ports are used up on an Exchange Server 2010 server
2816934 Error code 0X800CCC13 when an additional POP3 or IMAP account is used to send an email message and Outlook online mode is used to connect to an Exchange Server 2010 environment
2817140 Exchange Replication service crashes intermittently in an Exchange Server 2010 environment
2817852 Cyrillic characters are displayed as question marks in the "To" field of message items in the Sent Items folder in an Exchange 2010 environment
2818456 Attachments are missing from an embedded message in an Exchange Server 2010 SP2 environment
2826066 VSAPI-based antivirus software causes delayed response in an Exchange Server 2010 environment
2827037 Copy of an item is created in the Version subfolder in an Exchange Server 2010 environment
2833888 No items are displayed in Outlook after you install Exchange Server 2010 SP3 or Update Rollup 6 for Exchange Server 2010 SP2
2840099 ArgumentOutOfRangeException exception when an EWS application creates a new MIME email in an Exchange Server 2010 environment
This may, or may not be an issue depending on the language used for your Windows Server 2012 installation.
You cannot install or uninstall Update Rollup 1 for Exchange Server 2010 SP3 on a computer that is running the double-byte character set (DBCS) version of Windows Server 2012 if the language preference for non-Unicode programs is set to the default language. To work around this issue, you must first change this setting. To do this, follow these steps:
After you successfully install or uninstall Update Rollup 1, revert this language setting, as appropriate.
The Exchange Team are aware of this and will look to correct this in a future update.
Now, before we rush off to download and install this there are a couple of items to mention!
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A warning to anyone running Exclaimer Mail Disclaimers: the RU1 patch will stop your disclaimers from working. I've spoken to Exclaimer and have confirmed this is an issue but they don't have a fix yet. The workaround is to uninstall RU1....
Yes there is a thread about this over on the TechNet forums.
For folks reading this in the future:
There are two fixes listed in the Exchange 2010 SP3 RU2 release on transport.