Question : Domain Admin Exchange account

We used to have a server called svr1. This was a SBE domain controller. We migrated to a 2008 domain ages ago and now have a dedicated exchange server.

For a while we have had these errors and they arent very important, but thought it was time to clean it up. (see attached images)

For normal users this tab shows "mailbox store" and not "home server"

how can i change this to our server "svrexchange"

Attachments:

administrator-1.jpg (57 KB) (File Type Details) 

AD View

administrator-2.jpg (263 KB) (File Type Details) 

Exchange System Manager View

Answer : Domain Admin Exchange account

Some clarifications please.

a) What is a SBE Domain controller ? Is this Small Business Server ?
b) Does that mean you migrated from SBS 2003 to Windows 2008  + Exchange Server ?

How did you remove the previous domain controller from the domain ? Did you use DCPROMO ?
How did you remove the previous exchange server ?

Did you follow this ?
http://technet.microsoft.com/en-us/library/bb288905(EXCHG.80).aspx

Attached screenshot of mail queue ? Does this stay there always ?
do you have some kinda solution to prevent backscatter, directory harvest type spam attacks

Let us know about what steps you did.