Exchange Mixed Environment

Unable to create mailboxes in Exchange 2003

We are currently migrating from Exchange 5.5 to 2003. We have successfully installed the main Exchange 2003 into the first of our two Exchange 5.5 sites. However, we do not appear to be able to create a mailbox using ADUC on the Exchange 2003 server as yet. Is this expected behaviour, and we...

Exchange 2007 mixed enviornment and forwarded meeting invites

I am noticing a strange issue in an Exchange 2007/2003 mixed environment in regards to meeting invites. When a meeting recipient forwards a meeting invite to another user the user gets: Please see message copied below: Your message wasn't delivered because of security policies. Microsoft Exchange...