failed Acronis Backup & Recovery 11.5

>Message: Logging on with the specified credentials is impossible, probably because the account does not exist or the password is invalid.

Edit the backup plan, specify valid credentials of an existing user in 'plan credentials' so that the task could run.

This error should be visible in logs when you connect management console to the problem machine.

interesting;
you said impossible?
backups have been running for 1-4 through 1-8. using same credentials!
started failing 5 days after that,
nothing had changed to that point?
followed faq's,;
re-installing scheduler-no help,
uninstalling Acronis & re-installing - no help,

any suggestions?

company is not going to move ahead for a enterprise system wide install if the trial cannot even run a two week period without failing?