Search Microsoft 365
Mailboxes, shared mailboxes, Online Archives and OneDrive – Lookeen Server searches Microsoft 365 together with your file servers and PST archives. Through the Microsoft Graph API, the interface Microsoft is moving everyone to.
What Lookeen searches in Microsoft 365
Mailboxes
Emails with attachments, calendars, contacts and tasks – personal and in shared mailboxes.
Online Archive
Every mailbox's Online Archive, together with current email.
OneDrive
Personal files in OneDrive – searchable by content, with preview.
The Online Archive – even after EWS is gone
Microsoft is switching off EWS
Microsoft is retiring Exchange Web Services (EWS) in Exchange Online. Since October 2026, EWS is being disabled step by step across all organizations: anyone still using EWS has to allow each application individually by its App ID. By April 2027, EWS in Exchange Online is to be fully disabled. On-premises Exchange Server is not affected.
Many tools lose the archive
The successor is the Microsoft Graph API. But general access to In-Place Archives through Graph is still on Microsoft's own roadmap – so many Graph-based tools can't reach the Online Archive at all.
Lookeen searches it via Graph
Lookeen Server's Microsoft 365 connector indexes the Online Archive through the Graph API. Your archived email stays searchable – no matter when EWS is switched off in your tenant.
A note on public folders
Microsoft doesn't plan a Graph API for public folders in Exchange Online. Lookeen indexes them through its EWS-based connector for as long as EWS is available in your tenant – talk to us about planning ahead.
Securely connected
- App registration in Entra ID: Lookeen Server signs in as an application (OAuth2 client credentials). A script sets up the registration with the required Graph permissions.
- Index on your own network: Content is indexed and stored on your Lookeen Server – not in yet another cloud.
- Permissions respected: Personal content is only visible to its owner; access to shared mailboxes is taken over from Microsoft 365.
- Both connectors side by side: The EWS-based Office 365 connector and the Graph-based Microsoft 365 connector can run at the same time – for an orderly transition.
Learn more: Email search · On-premises search · PST archives