Since Exchange server 2010 SP1 has been released on the 1st of September 2010, its too early for me to roll out on my production environment. “Some of the hotfixes would have been rolled up in a Windows update or service pack. Given that the Exchange team released SP1 earlier than what was planned and announced earlier, it did not align with some of the work with the Windows platform. As a result, some hotfixes are available from MSDN/Connect, and some require that you request them online using the links in the corresponding KBAs. The administrator experience when initially downloading these hotfixes may be a little odd. However, once you download the hotfixes, and receive two of the hotfixes from CSS, you can use the same for subsequent installs on other servers. In due course, all these updates may become available on the Download Center, and also through Windows Update.”. Good to know that Exchange team is closely working on all the issues and updating it. I will wait for another 1 to 2 months for my rollout. For more information http://msexchangeteam.com/archive/2010/09/01/456094.aspx

Also another helpful blog for the SP1 installation… click here

Microsoft Exchange Server 2010 SP1 accepts only ten devices per account – iOS4..more info click here

Problems when installing Exchange 2010 Service Pack 1 on a TMG configured for Mail protection..Click here  (Update: A fix for this problem is now available for download as part of Software Update 1 for Microsoft Forefront Threat Management Gateway (TMG) 2010 Service Pack 1.)