WebPortal - Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'

Hi Community!

I'm facing some issues while installing web portal for One Identity 8.2.1.

I can't run my IIS application of the web portal because I have the following error:

Server Error in '/AppServer' Application.
________________________________________
Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.

Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[SqlException (0x80131904): Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.]
   System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool pool, String accessToken, Boolean applyTransientFaultHandling, SqlAuthenticationProviderManager sqlAuthProviderManager) +1431
   System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +1085
   System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions) +57
   System.Data.ProviderBase.<>c__DisplayClass31_0.<TryGetConnection>b__0(Task`1 _) +87
   System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke() +101
   System.Threading.Tasks.Task.Execute() +70
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   VI.DB.DataAccess.<OpenPhysicalConnectionAsync>d__29.MoveNext() +436

I can't understand if the problem is located in IIS application or in the database.

Do I need to change some settings is IIS Manger? Or I need to add new user in my database?

Thanks!

Daniele