When migrating a mailbox that is larger than the per mailbox migration data limit (MaxMegaBytesPerMailbox, which defaults to 500 GB) for On Demand Migration for Email (ODME) the following warning is logged:
"Migration stopped because the target mailbox size exceeds the allowable limit."
This or a very similar error "target mailbox size exceeds allowed limit" can also be encountered when migrating using the On Demand Migration (ODM) tool, which has no maximum mailbox size limit.
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