Password synchronisation issue
We are running EV7.5 SP3 linked to Exchange 2003. We operate a policy of forcing users to change their network password each month. Recently, one user has been unable to access her archive after changing her network password. Each time she tries to access an archived mail after changing her password, she gets a continual prompt for her credentials. This started in March, so it has happened twice so far; up until now the onsite support team resolved it by clearing the temp IE files, deleting cookies and remembered passwords etc. Unfortunately that doesn't work now. We have also tried running resetevclient.exe, with the user logged in with admin rights, but still it does not work.
Any suggestions gratefully received, and if my explanation is missing any necessary info, please let me know.