I have several servers that run TS desktops for users via XenApp. Recently all users began being prompted for an Outlook and SharePoint login each time they logged into their Windows session.
these are W2K3 servers running Outlook 2007, connecting to an Exchange 2007 server, and all are on the domain.
If you choose to save the password, it will not save, but the domain\username stays.
If you do not ebter a password, you are connected to Outlook anyway. It is already Online.
Definitely seems DNS related but I'm not sure where else to look. No DNS or Kerberos errors on the DCs that are related that I can tell.