I have completed a migration from Exchange 5.5 to 2003. I shut the 5.5 server down for 2 weeks to see if there were any outstanding issues. None were reported.
I turned on the 5.5 server and followed the steps outlined in numerous posts/articles about removing an Exchange server. It seemed to go well and I have no apparent issues with mail and there are no outstanding error messages in the event log.
However, the old server is still showing up in ESM. If I right select the server name, All Tasks, I only get the option for Start Mailbox Management Process. If I do this on the 2003 server I do get the option to delete the server.
Under Routing Groups, Site, I have listed an SMTP connector for the 2003 server, and Internet Mail SMTP connector for the 5.5 server, a MS Mail connector for the 5.5 server, a ccMail connector for the 5.5 server, under Tools, Site Replication Services I have a service called Microsoft Exchange Site Replication Service that references the 2003 server.
On another server I have ADC that only lists Config_CA referencing the site and the 2003 server.
If I use ADSI I can see the 5.5 server listed.
My question, of course, is how do I get rid of the 5.5 server so that I can go to native mode. The option for native mode is currently grayed out as would be expected.
I have been hesitant to go about deleting items, particularly in ADSI, because of the potential for problems.