| Event Id | 4000 |
| Source | MSExchangeMig |
| Description | Invalid eItemSource for GroupWise message with Subject '<subject>' for user '<user name>'. |
| Event Information | A valid source of a message is either the Inbox, Sent Items, personal folders, or another message. The source of this message was not valid, and it will not be migrated. No user action is required; however, if you want to migrate the message, you need to fix the error in the migration files. Use a two-step migration to create migration files. Find the message, fix the error, and then import the files. For more information, see the Exchange online documentation. |
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