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Get-MoveRequestStatistics ShardBytesTransferred - What are ShardBytes?
Running a Hybrid Migration at the moment, Exchange 2016 to Exchange Online. Completed several hundered moves without many issues other than Source/Target Principal issues. One mailbox has sho...
A SHARD mailbox is a hidden mailbox for user's who's mailboxes haven't been migrated to Exchange Online. There are services in M365 that require a cloud mailbox to store information (generally this is around collaboration), so a SHARD mailbox for the non-migrated user is created to store that information. When the migration of mailbox to EXO completes, the EXO based SHARD mailbox is then merged into the mailbox migrated from on-premises. If this is failing, then you will probably need to contact Microsoft support to fix it up