When you install Exchange 2013 into a Exchange 2010 organization and try to access https://exchange2013cas/ecp – Exchange server will show Exchange 2010 ecp. To access the Exchange 2013 ecp you will have to specify your Exchange version in the URL.
https://exchange2013cas/ecp?ExchClientVer=15
Reference: http://technet.microsoft.com/en-us/library/jj150562(v=exchg.150).aspx#access
Nokia Lumia 920 firmware 1308 finally lands on my phone. Hopefully there will be some fixes for the reboots. After a few days the answer is that all my problems are gone 
. My phone has been working flawless.
Had a issue where “externalewsurl” and “externaloaburl” was missing from Exchange autodiscover. All urls was configured on the Exchange server and all other information was available through autodiscover. In the end I found out that the Outlook provider for Outlook anywhere was missing. Create New EXPR provider and set external wildcard certificate as CertPrincipalName.
