The following may be seen in the Office 365 Module log file:
2015-07-23 10:57:02Z|1278| 13| INFO| ExecuteInternal|Provisioning Mailbox for [AL-Test_XYZ_user_1__ABRDS____User_has_been_disabled_by_DOP_201105@XYZ.onmicrosoft.com] Create archive [True] 2015-07-23 10:57:35Z|1278| 72| INFO| ProcessingStatisticsTimerOnElapsed|Mailboxes in queue/processing:  | Items in queue/processing:  2015-07-23 10:57:35Z|1278| 34| INFO| OnLogTimerElapsed|Ingest Statistics: Working Threads:  Waiting Threads:  Waiting Items:  2015-07-23 10:57:36Z|1278| 32| INFO| RefreshConfigFromCore|Configuration refreshed from Core. 2015-07-23 10:57:44Z|1278|148| INFO| Get|Querying Core for 69 Commands with additional info (Backlog: 1) 2015-07-23 10:57:49Z|1278|148| INFO| Get| -> Received no new command. Service might be out of schedule or there is nothing to do. 2015-07-23 10:58:22Z|1278| 13|ERROR| ProcessPipeErrors|Errors were detected. Review the following: 2015-07-23 10:58:22Z|1278| 30|ERROR| ProcessPipeErrors|System.Management.Automation.RemoteException: String length validation failed 2015-07-23 10:58:22Z|1278| 39|ERROR| Execute|Unable to process command Office365ProvisionMailbox: System.ApplicationException: System.Management.Automation.RemoteException: String length validation failed at ArchiveShuttle.Module.Office365.Office365PsBase.ProcessPipeErrors(PipelineReader`1 errors, Boolean throwException) at ArchiveShuttle.Module.Office365.Office365MailboxProvisioner.ProvisionMailbox(String userPrincipalName, Boolean createArchive) at ArchiveShuttle.Module.Office365.Office365MailboxProvisioner.ExecuteInternal(ModuleCommand command) at ArchiveShuttle.Module.Office365.Office365PsBase.Execute(ModuleCommand command)
The left-hand part of the mailbox (before the @) can be at most 64 characters, and in this example, the name given is longer than that.
The issue is handled by Archive Shuttle with trimming the part before @. In case this will happen the temporary solution is to edit the UserPrincipalName field in the [User] table in the Archive Shuttle Directory Database, ensuring the left-hand part is less than 64 characters, or Archive Shuttle will trim the left-hand part of the email (before the @) to match the limitations.