Microsoft 365에서 imapsync 마이그레이션 날짜 수정
imapsync 마이그레이션이 Microsoft 365에서 잘못된 날짜를 표시하는 이유
imapsync migrations to Microsoft 365 (Exchange Online) face a double challenge with date preservation. First, Exchange Online's IMAP gateway has specific behaviors that can override the INTERNALDATE provided by imapsync's --syncinternaldates flag. Second, Exchange Online adds its own Received 헤더 during the IMAP APPEND process, stamping every message with the 마이그레이션 타임스탬프.
Microsoft 365's IMAP implementation is limited compared to full Exchange protocols (EWS, MAPI). When imapsync uploads via IMAP, the message passes through Exchange Online's transport pipeline, which processes it similarly to a new incoming message. This pipeline adds transport headers, runs 규정 준수 checks, and stamps the message with delivery metadata that reflects the actual upload time rather than the requested INTERNALDATE.
Administrators who choose imapsync for Microsoft 365 migrations (often because it is free and scriptable) discover after the migration that date preservation did not work as expected. The --syncinternaldates flag, which works correctly with many standard IMAP servers, does not produce the expected results with Exchange Online's particular IMAP implementation. The entire migrated 사서함 shows the 마이그레이션 날짜 across all Microsoft 365 clients.
Microsoft 365에 미치는 영향
In Microsoft 365, the 마이그레이션 날짜 appears uniformly across Outlook desktop, OWA, Outlook mobile, and Microsoft Search. Unlike Gmail (where the web client may mask the issue), Microsoft 365 clients all reference the same delivery timestamp. Users have no workaround and no client that shows the 올바른 날짜 until the underlying Received 헤더s and INTERNALDATE are corrected at the 서버 수준.
Microsoft 365 administrative and 규정 준수 features are equally affected. Exchange Online Protection, Data Loss Prevention policies, and Microsoft Purview 규정 준수 searches all index the 마이그레이션 타임스탬프. For 조직s subject to data 보존 regulations, the corrupted dates mean that 보존 policies based on message age operate on incorrect data, potentially leading to premature deletion of messages that should be retained or indefinite 보존 of messages that should have been purged.
자주 묻는 질문
Why does imapsync --syncinternaldates fail with Microsoft 365?
Exchange Online IMAP implementation processes uploaded messages through its transport pipeline, which can override the requested INTERNALDATE. Additionally, Exchange Online adds Received 헤더s that carry the upload timestamp. These server-side behaviors are outside imapsync control.
Should I have used a different migration tool for Microsoft 365?
Most migration tools (including commercial ones like BitTitan and CloudM) produce the same date issue because the root cause is in how Exchange Online processes uploaded messages. The migration tool choice does not prevent the problem. Redate.io fixes it 에 관계없이 which tool was used.
Can Redate.io fix imapsync-migrated 사서함 in bulk?
예. Redate.io supports bulk 사서함 processing for Microsoft 365. Administrators can scan and fix multiple 사서함 from a single dashboard. The Enterprise 플랜 supports up to 100,000 emails per 사서함.