We have not applied any patch neither password is changed, But we have moved server to new data center and also IP address of the server is changed.
Do you thank, that can cause this issue. Also, I have tried to access essbase through EAS I am able to do access and do most of the operation but got same error when I clicked on the Data Preview.
Error "1051293 Login Fails Due To Invalid Login Credentials" When User logs into Essbase Server via Essbase Administration Server and Other Essbase Client Components [ID 833685.1]
may be this article helps you to reslove the issue.
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If you have moved the server to a new data center and an issue has started occurring then it could point to the change.
Are you able to log into essbase directly with Maxl using the same account?
If you run a registry report do you see any of the configuration with IPs instead of DNS/hostname