Use OWA URL links to compose message directly in Office 365

This is often asked on the different Office 365 communities, and we finally have a solution. You can get the details here:

With those new parameters, you can now configure OWA as the default handler for the mailto protocol in Windows, so that clicking an email address will open the OWA “Compose message” window. On older versions of Windows, this is done by modifying the Default value under the following registry key: HKEY_CLASSES_ROOT\mailto\shell\open\command.

For Windows 8 and above, the process is a bit more complicated and one needs to follow the instructions in

Thanks to the guys at MS that made it possible, and the ones that helped spreading the news J

4 thoughts on “Use OWA URL links to compose message directly in Office 365

  1. Eric Davis says:

    Does anyone have better directions on how to make this work? The links mentioned above are dead.

  2. Sherry says:

    Both of those links are 404. Can someone please post the instructions?

  3. John says:

    Would love to see the info once at theses links.

    I’m a frustrated webmail user on (msn, hotmail, etc.) and hope to take advantage of this info somehow.



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