Hi Daniel,
do you still have the 'windows firewall and port' information that you discovered was the root cause to your performance issue? I am also having similar types of issues with a new VOIP implimentation - big difference is we are not running VM or VMDK's just physical exchange environment, but our issue sounds alot like what you describe, for certain users each day the first time they retrieve voicemail we see delays 'tic toc sound' after entering the users password whilst it retrieves their voice mail from exchange, we have done significant work on exchange side of things to improve storage group/mailbox performance and archived items to reduce overhead, however still haven't got things to speed we were expecting. Saw your post and wondered were we missing something on the window FW and ports you are referring to, and would like to check that out.
Thanks in advance for any feedback/information you may be able to share.
Ben.
