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r/o365•
andyIMC

Switching from E3 to M365 license - how to "migrate"...

I have a client that are half M365 licenses and half E3 with AAD P1 licenses. I am switching all the E3/AADP! licenses to M365 at the client's request and the main difference I see is the mailbox size supported on M365 is only 50GB as opposed to that of E3 which is 100GB... any ideas as to what ahppes if I simply switch the license? Will the 100GB mailbox still function under a M365 license?

Any other foreseeable issues?

Posted Oct 22, 2019, 2:24 PM UTC

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Lumas24110•

As I understand it the main difference between Enterprise branch and Microsoft branch is that the Microsoft licence includes Windows 10 OS (including virtual desktop) on top.

You haven't said what m365 licence you are using (business, enterprise, education) but they are all different.

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andyIMCOP•

M365 business - not sure if that includes the virtual desktop but they may have added that...

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Wizedkyle•

Everything will keep functioning from a platform perspective it’s just that the user has a 50GB mailbox limit instead of 100GB.

So I would assume if your users are dropping to a 50GB mailbox limit then you are moving them to M365 Business which only has a subset of the O365 E3 and ADP1 features.

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xcoffeemonster•

isn't Microsoft 365 E3 = Office 365 E3 + Windows 10 OS? I supposed Microsoft 365 E3 comes with an Exchange Online Plan 2 service for the 100 GB mailbox.

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andyIMCOP•

Thanks for the comments so far - ones thing I failed to mention was that one of users already has a full 100GB mailbox (I don't know how they do it :-) ) and thus, how does that fact affect moving him to a license that only "allows" for a 50GB mailbox?

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