ECS: Unable to log in to ECS UI using Active Directory user: Local user with id domain user not found

Summary: This knowledge base explains why a user is unable to log in using Active Directory.

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Symptoms

Username format
Active Directory user login is failing on the ECS UI.
Active Directory user login failing
The following error can be seen in the authsvc (pre 3.2) or objcontrolsvc (post 3.2) logs: 
2019-07-09T10:01:39,898 [qtp1186841950-348101] ERROR  LocalClient.java (line 59) Exception occurred while interacting with the API server.
com.emc.storageos.objcontrol.object.exception.ObjectAccessException: local user with id : [ domain\user ]  not found
2019-07-09T10:01:39,900 [qtp1186841950-348101]  INFO  CustomAuthenticationManager.java (line 135) com.emc.storageos.auth.local.StorageOSLocalAuthenticationHandler failed to authenticate domain\user
2019-07-09T10:01:39,900 [qtp1186841950-348101] ERROR  CustomAuthenticationManager.java (line 140) Failed to authenticate domain\user
2019-07-09T10:01:39,998 [qtp1186841950-348101] ERROR  AuthenticationResource.java (line 651) User was null after authentication for credential: domain\user

Cause

Incorrect format used for the username

Resolution

The format <domain>\<username> cannot be used when logging in using an Active Directory user.
The username must be used under the format <username>@<domain>.

Affected Products

ECS Appliance

Products

ECS Appliance
Article Properties
Article Number: 000056307
Article Type: Solution
Last Modified: 23 Sep 2025
Version:  5
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