Prinzipiell schon... - in der IT-Abteilung machen wir das schon seit einigen Monaten ohne Probleme. Allerdings mit unveränderter Maildatenbank d.h. wir haben noch die R5 Mailschablone drauf...
Ist allerdings nicht die offiziell empfohlene Migrationstechnik. Es gibt ein super Redbook zur Migration von R5 auf Notes6... - hier ein Ausschnitt aus Kapitel 3.4.
3.4 Upgrading the client before upgrading the server
We recommend upgrading the servers before the clients because the interoperability options are stronger with that route, and you can start taking advantage of the many improvements available in Domino 6 server. That said, it is entirely possible to upgrade clients before servers. Users can take advantage of the benefits of the Notes 6 client right away, particularly if they have local
replicas of their mail files (see 3.6.1, “Mail file replicas (non-clustered)” on
page 21 for the correct way to configure this).
Client/Server R5 Domino Server Domino 6 Server
R5 Client with R5 mail
template
works works
Notes 6 Client with R5 mail
template
works works
Notes 6 Client with Notes 6
mail template
not supported* works
R5 Client with Notes 6 mail
template
not supported* Mail functions work, C&S is
limited. No new features are
available, including preferences