small update:
this weekend updated a exchange 2013 update 3 to sp1. (dag configuration with two nodes).
first one went flawless, no errors, no problems.
second node during the setup crashed 5 times with all kind of "sir" watson errors. reboot, started the update again,....and after 5 times it was succesfull. rebooted it. and works.
i can confirm that the sound notification is not playing in webmail (appointments).
if i can notice i think this is a stable update with a lot of fixes and the small issues i had in update 3 are now gone. thnx guys.:)
Microsoft