Wie umgehen mit alten ADSI-Einträgen

Guten Morgen Zusammen,

leider lässt mich das Thema Exchange nicht mehr los.

die Firma hatte vor meiner zeit einen Exchangserver 2003 am laufen.
Dann wurde auf 2007 aktualiiert. Laut dem damaligen Administrator wurde der Exchange 2003 richtig entfernt.
Nun wollen wir auf 2013 upgraden. der BPA von Exchange bringt aber immer wieder eine Warnung das der alte Exchange 2003 mit reinpfuscht.

Folgendes habe ich durch ein Skript ausgewertet bekommen:

name GC:CN=SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC})
adspath GC:CN=SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local GC:CN=SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local
canonicalname GC:CN=SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local DomainName.local/Configuration/Services/Microsoft Exchange/DomainName/Connections/SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC})
legacyexchangedn GC:CN=SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local /o=DomainName/ou=Erste administrative Gruppe/cn=Configuration/cn=Connections/cn=SMTP (Exchange2003)/cn={0C69F06A-DA57-4F2B-8850-B8EF379B94DC}
distinguishedname GC:CN=SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local CN=SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local
admindisplayname GC:CN=SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local SMTP (Exchange2003-{0C69F06A-DA57-4F2B-8850-B8EF379B94DC})
name GC:CN=SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7})
adspath GC:CN=SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local GC:CN=SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local
canonicalname GC:CN=SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local DomainName.local/Configuration/Services/Microsoft Exchange/DomainName/Connections/SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7})
legacyexchangedn GC:CN=SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local /o=DomainName/ou=Erste administrative Gruppe/cn=Configuration/cn=Connections/cn=SMTP (Exchange2003)/cn={1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}
distinguishedname GC:CN=SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local CN=SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local
admindisplayname GC:CN=SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local SMTP (Exchange2003-{1EBD76C6-09EF-4D8C-B4C9-DE51992B3CC7})
name GC:CN=SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740})
adspath GC:CN=SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local GC:CN=SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local
canonicalname GC:CN=SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local DomainName.local/Configuration/Services/Microsoft Exchange/DomainName/Connections/SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740})
legacyexchangedn GC:CN=SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local /o=DomainName/ou=Erste administrative Gruppe/cn=Configuration/cn=Connections/cn=SMTP (Exchange2003)/cn={C5EF0F07-4DE3-45BF-8622-4AD5BA285740}
distinguishedname GC:CN=SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local CN=SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local
admindisplayname GC://CN=SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740}),CN=Connections,CN=DomainName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=local SMTP (Exchange2003-{C5EF0F07-4DE3-45BF-8622-4AD5BA285740})


Jetzt stellt sich für mich die Frage,

kann ich die Einträge rauslöschen, da diese sowieso auf ein nicht mehr vorhandenen Server verweißen ?
muss ich die Einträge abändern auf den Exchange 2007?

Wäre sehr dankbar um jede Antwort.

danke schon mal