2025-08-20 10:28:35.507 ERROR [username@domain.name] [MigrationTool.Common.RuPostMigration.MailboxMigrator}] Migration of mailbox 'username@domain.name' has failed.
MailKit.Security.AuthenticationException: Temporary authentication failure. [rupostserver.domain.name:2025-08-20 10:28:35]
at MailKit.Net.Imap.ImapClient.AuthenticateAsync(Encoding encoding, ICredentials credentials, CancellationToken cancellationToken)
at MigrationTool.Common.Wrappers.ImapClientWrapper.ConnectAndAuthenticateAsync(CancellationToken cancellationToken)
at MigrationTool.Common.Clients.Imap.ImapClientFactory.CreateImapClientWrapperAsync(String emailAddress, ILogger logger, CancellationToken cancellationToken)
at MigrationTool.Common.RuPostMigration.MailFoldersMigratorBase.InitAsync(Mailbox mailbox, CancellationToken cancellationToken)
at MigrationTool.Common.RuPostMigration.MailFoldersMigratorBase.MigrateAsync(Mailbox mailbox, IMigrationLifetime migrationLifetime, CancellationToken cancellationToken)
at MigrationTool.Common.RuPostMigration.MailboxMigrator.ProcessMigrationAsync(Mailbox mailbox, MailboxMigrationStep targetStep, IMigrationLifetime migrationLifetime, CancellationToken cancellationToken)
at MigrationTool.Common.RuPostMigration.MailboxMigrator.MigrateMailboxAsync(Mailbox mailbox, MigrationMode migrationMode, MigrationObjectsSettings migrationObjectsSettings, IMigrationLifetime migrationLifetime, CancellationToken cancellationToken)