exchange 2007 2010 ews code migration

Our intranet (apache/php) is currently talking to our Exchange 2003 server via webdav. Our company was looking at upgrading from Exchange 2007 a while back, we even had the test server up and running and there was some effort made to port our webdav functionality to use the new EWS. The project was shelved for a while, but we are now开发者_运维知识库 looking at upgrading to 2010. Are there any big differences between the two EWSs? (I haven't been able to track down any articles about 2007 2010 EWS code migration.)

Answering to close this up. No modifications to EWS code were needed when migrating between servers.