**Update - Per the Exchange Team Blog (http://blogs.technet.com/b/exchange/) Exchange 2013 RTM CU1 is currently planned for an April 2nd release.
I want to deploy Exchange 2013. Can I do this now that 2010 SP3 is out?
Short answer is “Not if you want to be supported”. Although Exchange 2010 SP3 is prerequisite in the existing environment Exchange 2013 CU1 is still required to be supported. This should be released by the end of 2013 Q1. If you are deploying Exchange 2013 in a Greenfield (No existing Exchange products) environment then you don’t have to wait for CU1.
How do I take advantage of High Resolution photos with Lync 2013?
First of all let’s take care of the prerequisites. You must have an Exchange 2013 mailbox and also Lync Server 2013. Once your users are on both of these versions the process is fairly simple. You basically just upload the picture via OWA or script (below). This will upload the picture to the Root of the users mailbox (648x648 pixels) and also to AD (48x48 pixels). Once you do this we can verify by either opening Lync 2013 client, Options, My Picture or go to the EWS url (https://fabcm1.fabrikam.com/ews/Exchange.asmx/s/GetUserPhotofirstname.lastname@example.org&size=HR648x648).
$photo = ([Byte]] $(Get-Content -Path "C:\Photos\RSchwendiman.jpg" -Encoding Byte -ReadCount 0))
Set-UserPhoto -Identity "Richard Schwendiman" -PictureData $photo -Confirm:False
Set-UserPhoto -Identity "Richard Schwendiman" -Save -Confirm:False
***Please feel free to submit questions about anything Lync or Exchange related.***