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Moving from Mimecast to Defender

Aravind Gopalakrishna 0 Reputation points
2025-05-30T13:58:05.9966667+00:00

Hello there, I'm planning to move away the email security from Mimecast to Microsoft defender for Office 365, but I am a little confused with the Licenses I should use - I think I have mixture of E5 suite and F3+F5 security licenses. I believe both include Defender for O365 with them? Also, it would be great to see or hear any experience along with some guided steps to do it as I am not aware how Mimecast was setup to begin with.

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365

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  1. Catherine Kyalo 3,100 Reputation points Microsoft Employee
    2025-06-03T06:04:31.2133333+00:00

    Hi Aravind Gopalakrishna

    1. To clarify your concern about Licensing, E5 and F5 do have MDO plans while F3 does not. Refer to below image from - Microsoft 365, Office 365, Enterprise Mobility + Security, and Windows 11 SubscriptionsOr the Feature Matrix
    2. For a step by step guide - please refer to Microsoft Defender for Office 365 step-by-step guides. These are on your tenant and you'll need to be logged in to access them on this link - Defender for Office 365 setup guide User's image If you find the answer above helpful, please Accept the answer to help anyone in the community who might have a similar question to quickly find the solution.

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