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ErrorMessageSizeExceeded

Error:

Failed to retrieve items in Sent Items folder. Error: ErrorMessageSizeExceeded Message: The message exceeds the maximum supported size.

Cause:

By default, Exchange Server has message size limits of 10MB. Although the Exchange server may accept delivery of items larger than 10MB via SMTP, MigrationWiz migrates email using EWS, which is subject to different size limits.

Resolution:

  1. Change message size limits in Microsoft 365
  2. Change message size limits in Exchange

For more information about message size limits on Exchange Server:

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