Scheduler failed to run task with GUID because of error 1326 (Logging on with the specified credentials is impossible)

Hello Sir/Madam,

My company is using Acronis Backup & Recovery 11.0 for Window. It's buiild is 17440 and OS is Microsoft Windows 2008R2 standard edition.

I found there is a repeat error message as above appears in windows application event, at specific time every day.

After I check the Acronis console, there is no active Acronis backup task executed at specific time. There was once but I disabled it already. And I couldn't figure out which Acronis task is related to which GUID.

I confirm the Acronis Scheduler2 service is Local System account and automatic startup.

Unfortunately, the Acrosinfo.zip is too big to attach.

Please kindly help this strange issue.Thanks!

BR