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Last updated on 27 March 2026

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When co-authoring is enabled, many people can edit Office documents together. There are two versions of the co-authoring feature: native co-authoring and web co-authoring.

With native co-authoring, users can edit documents together with Microsoft 365 applications in M-Files Web and the new M-Files Desktop. Native co-authoring is available for M-Files Cloud customers in selected M-Files platform editions. When this feature is enabled, it is the default edit operation for documents that can be co-authored.

With web co-authoring, users can edit documents together with Microsoft Office for the web. Web co-authoring is available in M-Files Web, the new M-Files Desktop, and the classic M-Files Desktop.

Note: You can only enable one type of co-authoring in one vault. If web co-authoring is enabled, you must disable it before you can enable native co-authoring.

Enabling native co-authoring

Important information

  • After native co-authoring is enabled, it cannot be disabled.
  • You can only enable one type of co-authoring in one vault. If web co-authoring is enabled, you must disable it before you can enable native co-authoring.
  • This feature is available for M-Files Web and the new M-Files Desktop. For more information about future improvements and functionalities, refer to Microsoft 365 Storage and Native Experiences FAQ in M-Files Support Portal.
  • It is recommended to use native co-authoring with M-Files November '25 Update or later.
  • Native co-authoring is available for M-Files Cloud customers in selected M-Files platform editions. When this feature is enabled, it is the default edit operation for documents that can be co-authored.

When Microsoft 365 storage is enabled in a vault, native co-authoring is also enabled. For instructions on how to enable Microsoft 365 storage, see Enabling Microsoft 365 storage.

Enabling web co-authoring

Prerequisites

Before you enable web co-authoring, make sure that:

  • M-Files Web is set up. If you use M-Files Cloud, M-Files Web is already set up. Otherwise, set up M-Files Web in M-Files Admin.
  • You have the latest Microsoft security updates in your environment. For information on the available updates, refer to Microsoft Update Catalog.

Setting up Microsoft Office for the web

To use web co-authoring , you must enable Microsoft Office for the web tools in your vaults.

Deployment Instructions

M-Files Cloud

You must have a valid Microsoft 365 subscription to use the Microsoft Office for the web services.

Request our customer support (M-Files Support Portal) or your M-Files reseller to enable these features.

On-premises server

Refer to Enabling Microsoft Office for the Web Services for M-Files to deploy Office Online Server and set M-Files to use Microsoft Office for the web services.

Self-managed cloud environment

Your organization must be a part of Office Cloud Storage Partner Program to enable these features.

Refer to Enabling Microsoft Office for the Web Services for M-Files to deploy Office Online Server and set M-Files to use Microsoft Office for the web services.

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