Microsoft 365でのBitTitan MigrationWiz移行日付の修正
BitTitan MigrationWizの移行がMicrosoft 365で間違った日付を表示する理由
When BitTitan MigrationWiz migrates メールボックス into Microsoft 365, it uses the Exchange Web Services (EWS) or IMAP protocol to upload messages to the destination tenant. During this upload, Microsoft 365's mail infrastructure stamps each message with a new Receivedヘッダー containing the 移行タイムスタンプ. This header becomes the most recent entry in the email's ヘッダーチェーン.
Microsoft 365 stores this timestamp as the message's INTERNALDATE. Every client that connects to the M365 メールボックス (Outlook desktop, Outlook on the web, Outlook mobile, and third-party IMAP clients) reads this INTERNALDATE to determine when the message was received. As a result, the entire メールボックス displays the 移行日 for every email, に関係なく when the message was originally sent or received.
For 組織s migrating to Microsoft 365 from on-premises Exchange, Google Workspace, or other platforms using BitTitan, this 日付の破損 affects every migrated メールボックス simultaneously. IT teams face a wave of support tickets from ユーザー who can no longer find emails by date across any of their M365 applications.
Microsoft 365への影響
In the Microsoft 365 ecosystem, the impact extends beyond a single client. Outlook on the web (OWA), Outlook desktop, Outlook for Mac, and the Outlook mobile apps all display the 間違った日付. Microsoft's Copilot and AI features that reference email timelines also produce incorrect results because they rely on the same corrupted date metadata.
Compliance and eDiscovery workflows in Microsoft 365 are 特に affected. Litigation holds, 保持 policies, and コンプライアンス searches that filter by date range return inaccurate results. Administrators who need to produce emails from a specific time period for legal or audit purposes cannot rely on the displayed dates. Microsoft 365's built-in search and the Security & Compliance Center both reference the corrupted INTERNALDATE, making accurate date-based queries impossible without first fixing the underlying data.
よくある質問
Does BitTitan MigrationWiz corrupt dates when migrating to Microsoft 365?
はい。 BitTitan MigrationWiz adds a Receivedヘッダー during the migration process that overwrites the displayed date in Microsoft 365. This is a known side effect of IMAP-based migration and affects all M365 clients and services that reference the message date.
Will fixing dates affect Microsoft 365 コンプライアンス and 保持 policies?
Redate.io restores the 元の日付s, which actually improves コンプライアンス accuracy. After the fix, 保持 policies, eDiscovery searches, and litigation holds reference the correct 元の日付s rather than the misleading 移行タイムスタンプs.
Can Redate.io fix dates across all Microsoft 365 apps at once?
はい。 Redate.io fixes the email at the サーバーレベル by correcting the Receivedヘッダーs and INTERNALDATE. The corrected date then appears 自動的に in Outlook desktop, OWA, Outlook mobile, and any other client connected to the Microsoft 365 メールボックス.