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1669 - Microsoft Graph error: HTTP 503 "Mailbox info is stale"
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1667 - Xero backups not completing due to daily API limits
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1666 - Xero backups failing due to insufficient permissions
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1665 - Unknown machines appear among backup accounts
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1664 - Archiving fails with "account mismatch" errors
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1661 - RedApp authentication pop-up not appearing
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1660 - Microsoft 365 backup fails with error “service principal for resource is disabled"
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1658 - M365 or Entra ID backup fails with error “resource principal not found”
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1657 - Backup scan fails with error "OneDrive account could not be accessed"
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1650 - Exchange backup scan completes with error “This mailbox is not a valid Microsoft 365 mailbox”