Feature Request: Support ingestion of M365 in-place / online Archive mailboxes #39

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MrUnknownDE · 2026-04-05T16:16:14+02:00

MrUnknownDE commented

2026-04-05 16:16:14 +02:00

Originally created by @bonez56 on 2/15/2026

Is your feature request related to a problem? Please describe.

Open-Archiver does not appear to currently support ingestion of Exchange Online In-Place Archive mailboxes.

In environments where retention policies automatically move mail older than 12 months to the archive mailbox via the Managed Folder Assistant, the primary mailbox only contains recent items. As a result, new Open-Archiver deployments only ingest approximately the most recent year of mail and miss historical content stored in the archive.

Describe the solution you'd like

Support ingestion of Exchange Online In-Place Archive mailboxes alongside the primary mailbox.

Ideally, Open-Archiver would:

Detect when an archive mailbox is present, and/or
Provide a configuration option to include archive mailbox ingestion

This would allow full historical mailbox coverage on initial ingestion without requiring administrative workarounds.

Describe alternatives you've considered

As a temporary workaround, it is possible to move mail from the Online Archive back into the primary mailbox, allow Open-Archiver to ingest it, and then allow the Managed Folder Assistant to re-archive the content.

However, this approach is operationally inconvenient and does not scale well, so native archive mailbox support would be preferable.

Additional context

I am unsure whether this limitation is due to current Open-Archiver implementation or a Microsoft Graph constraint, but it would be helpful to confirm feasibility.

Thank you to the team for the excellent work on the project.

*Originally created by @bonez56 on 2/15/2026* **Is your feature request related to a problem? Please describe.** Open-Archiver does not appear to currently support ingestion of Exchange Online In-Place Archive mailboxes. In environments where retention policies automatically move mail older than 12 months to the archive mailbox via the Managed Folder Assistant, the primary mailbox only contains recent items. As a result, new Open-Archiver deployments only ingest approximately the most recent year of mail and miss historical content stored in the archive. **Describe the solution you'd like** Support ingestion of Exchange Online In-Place Archive mailboxes alongside the primary mailbox. Ideally, Open-Archiver would: * Detect when an archive mailbox is present, and/or * Provide a configuration option to include archive mailbox ingestion This would allow full historical mailbox coverage on initial ingestion without requiring administrative workarounds. **Describe alternatives you've considered** As a temporary workaround, it is possible to move mail from the Online Archive back into the primary mailbox, allow Open-Archiver to ingest it, and then allow the Managed Folder Assistant to re-archive the content. However, this approach is operationally inconvenient and does not scale well, so native archive mailbox support would be preferable. **Additional context** I am unsure whether this limitation is due to current Open-Archiver implementation or a Microsoft Graph constraint, but it would be helpful to confirm feasibility. Thank you to the team for the excellent work on the project.

MrUnknownDE added the enhancement enhancement enhancement enhancement enhancement enhancement labels 2026-04-05 16:16:14 +02:00

MrUnknownDE referenced this issue

2026-04-05 16:17:16 +02:00

Fix UI size display and ingestion history graph #285

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Reference: github/OpenArchiver#39