Symptoms:
During mail sync for a large mailbox with archive, the following error is observed during migration of the archive mailbox:
"Migration failed due to Target Mailbox Quota Exceeded",mail000002,""
“Upload Message Exception: ShutoffQuotaExceeded The operation failed because it would have exceeded the mailbox's shutoff quota.”
Cause:
This error occurs because the mailbox has exceeded the default size limit for the archive mailbox in O365, set by Microsoft.
Resolution:
Client should consider reducing the archive mailbox size or request the quota to be extended by opening a support case with Microsoft O365 support.
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