Hi Experts, we have added an Exchange 2010 server in our organization which contains an Exchange 2003 server. All mailboxes, public folders have been moved to Exchange 2010. From the Exchange 2010 server which is now a Hybrid server all mailboxes have been moved to O365. I need to decom the old Exchange 2003 server. What checks do I need to do before decoming the Exchange 2003 server?