The Exchange Development Blog has a new post about the recently released Rollup 4 for Exchange 2007 SP 1. There are several key changes to Exchange Web Services in this release that are discussed in the post…
“…If you have written code against Exchange Web Services, we definitely recommend that you take a look at RU4. The following are the biggest changes that will be coming in the rollup:
– Item IDs are now returned after MoveItem/CopyItem calls.
– Unknown/unsupported item types are returned as Messages.
– Updating tasks can now have correct behavior for Start and Complete Date values…"