I recently ran into this and wanted to share, as I'm sure others may run into this as well. 

As many of you may know, Windows RT 8.1 includes a version of Outlook 2013...so that you're not limited to just using the Windows Mail app...which is great!  However, what many may run into is that the default location for storing your OST is C:\Users\<login>\AppData\Local\Microsoft\Outlook.  Which, if you have the 32GB Surface (or equivalent) you probably don't want a big OST file eating up your space.  In my case, I installed a 32GB SDHC in my Surface RT and wanted the OST to be there.

The issue is that you can only set where the OST file is created during Profile creation...not once you've setup the profile.  If you try once the profile is setup, the option to Browse and select where the OST file goes is grayed out.

This KB article http://support.microsoft.com/kb/2752583  explains how to set where to put the OST during Profile creation and *is* also applicable to Outlook 2013 on Windows RT.

As I mentioned in the Current Cumulative Updates for Office - Q3 2012 post, each quarter I will post information on the latest updates for the Office for Windows and Office for Macintosh products.

The information below is being provided regarding the most currently available updates available for the supported Windows and Macintosh versions of Office as of October 1, 2013.

As a reminder on why I'm providing this information and how it should be used, please see my Keeping Up with Office Updates post which discusses the cumulative updates for Office (and Outlook in particular) that companies need to be aware of and push out to their users. 

Office for Windows

Office 2013

• Current Service Pack level: Office 2013 SP0
• Latest cumulative August 2013 (http://support.microsoft.com/kb/2873346)
• Outlook specific: August 2013 (http://support.microsoft.com/kb/2817347)

Office 2010

• Current Service Pack level: Office 2010 SP2
• Office 2010 SP1 support will end on October 14, 2014
• Note: Office 2010 RTM (SP0) support ended July 10, 2012
• Latest cumulative Update: August 2013 (http://support.microsoft.com/kb/2869757)
• Outlook specific: August 2013  (http://support.microsoft.com/kb/2817574)

Office 2007

• Current Service Pack level: Office 2007 SP3 (released October 2011)
• Note: Office 2007 is now in Extended Support as of October 9, 2012.
• Latest cumulative Update: June 2013 (http://support.microsoft.com/kb/2855360)
• Outlook specific: April 2013 (http://support.microsoft.com/kb/2799874)

Office 2003

• Current Service Pack Level: Office 2003 SP3
• Latest cumulative Update: June 2010 (http://support.microsoft.com/kb/2270183)
• No new cumulative updates will be released as Office 2003 is out of mainstream support.  Extended support will end on April 8, 2014.

Note: Each of the KB articles includes the list/links for all the Office products (Word, Excel, Outlook, etc).  Most of you focus on Outlook and that’s the only ones required and is also provided separately but I wanted to provide the larger “Office” list in case you want it.

As a reminder, Microsoft Update does *NOT* make the cumulative updates available to users.  These have to be downloaded and either installed independently or deployed using tools such as WSUS, SCCM, etc. 

Office for Macintosh

Office 2011

• Current Service Pack Level: Microsoft Office for Mac 2011 SP3 (released January 2013)
• Note: Office for Mac 2011 SP1 support ends July 9, 2013
• Note: Office for Mac 2011 SP2 support ends April 8, 2014
• Office for Mac 2011 support ends on January 12, 2016
• Latest cumulative Update: September 2013 - 14.3.7 (http://support.microsoft.com/kb/2877813)

Office 2008

• Current Service Pack Level: Microsoft Office 2008 for Mac SP2 (released October 2009)
• Office 2008 for Mac support ended on April 9, 2013
• Latest cumulative Update: March 2013 - 12.3.6 (http://support.microsoft.com/kb/2817449)

Note: Each of the KB articles includes the link for downloading the package which updates ALL Office Products…there are not separate updates for each of the various components of Office as there is with the Windows releases.