McAfee EPO 5.0.1 was working smoothly till yesterday now when i tried to login today it keeps giving me error of invalid credentials i have already restarted the services of SQL and EPO but issue not resolved your kind suggestion will be very helpful for the resolution of this issue .
Check if your ePO and SQL DB connection is working fine.
Where 8443 is the ePO console port.
I'll suggest to follow below McAfee KB article and see if its fixes the issue.
If its not fixing than let me know, will try some other options.