I just perfomed a deployement of Exchange server at a clients site. They had hosted exchange. Their hosting provider refused to provide any support in the migration process. The only thing they did was provided the PST files. I have the users migrate their own PST files into the exchange server through outlook ..
Their incoming email domain is the same xyz.com. Now the problem they are having is with local PST within the company they are pulling the OU information from the hosted exchange so if they use personal contacts to send an email within the company they get a bounce back ,
and any recurring meeting if they try to update and send a response to internal or external users. They get an immidiate response that you do not have premission to send on behalf of the user.
This is getting to be a very hot issue so any help would be greatly appriciated.