Various actions in Plesk fail with the error: Unable to logon user: The user name or password is incorrect

Symptoms

• Subdomain creation fails in Websites & Domains > Add Subdomain with the error:

  PLESK_ERROR: Error: filemng failed: Unable to logon user (servernamesystemuser): (1326) The user name or password is incorrect.
  at LogonUser(servernamesystemuser)(CClientProfile::logon line 126)
  at Plesk impersonation(PipeServer::ServerThread::impersonateWithoutProfile line 754)
  at execute “C:Program Files (x86)Pleskadminbinfilemng” example –ex-create-directory “–path=C:Inetpubvhostsexample.comold.example.com”(RunTime::RunAsUser::run line 223)
  (Error code 1)

• The following error might be shown on attempts to open a website in a browser:

  aspnetcfg failed: The user name or password is incorrect. (Error code 1326) at Unable to logon user

Cause

The system users accounts’ credentials in the OS are out of sync with those in the Plesk database.

Resolution

1. Login to the server via RDP

2. Start the command prompt

3. Execute the following command to synchronize system users with the information in the database:

   C:> “%plesk_cli%repair.exe” –synchronize-impersonation-storage

4. Execute this command to repair system user accounts on all subscriptions:

   C:> “%plesk_cli%repair” –repair-all-webspaces-system-users