Can i give Exchange License for external user with Microsoft 365 E5 Developer License

Alex Bui 0

Hi All,

I have an account with a Microsoft 365 E5 Developer license. I can invite a few external members into my organization, and I can assign licenses to them. They can use Microsoft 365 software like MS Teams and SharePoint normally. However, they cannot log into Outlook (Exchange) even though I checked and saw that Microsoft 365 E5 Developer includes Exchange Online Plan 2. I don't know if this is due to some setting or if there are other conditions missing to be able to use email. Can anyone help me with this issue?

Bruce Jing-MSFT 7,475 Reputation points Microsoft Vendor

2024-05-30T06:57:25.2533333+00:00

Hello, @Alex Bui

It's been a long time since I've heard from you, have you solved your problem yet? Did my previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Bruce Jing-MSFT 7,475 Reputation points Microsoft Vendor

2024-06-04T06:12:06.07+00:00

Hello, @Alex Bui

It's been a long time since I've heard from you, have you solved your problem yet? Did my previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Alex Bui 0 Reputation points

2024-06-11T08:58:03.2366667+00:00

Sorry for just now responding to you.

1 answer

Bruce Jing-MSFT 7,475 Reputation points Microsoft Vendor

2024-05-13T12:00:59.3633333+00:00

Hi，

Thanks for posting your question in the Microsoft Q&A forum.

Based on your description, I conducted related experiments to invite external people in the Microsoft Entra Center.

After assigning the M365 license, I don't see that external mailbox in Exchange Online.

I tried to log in using my external email account and password, but an error occurred.

So it is not possible to log in to Outlook by assigning a license to external users.
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Alex Bui 0 Reputation points

2024-05-14T06:35:59.15+00:00

yes, me too, our external user can not use outlook with this license, but they can use Microsoft Team, i dont know why

Bruce Jing-MSFT 7,475 Reputation points Microsoft Vendor

2024-05-28T07:54:49.2733333+00:00

Hi，@Alex Bui

In response to your reply, I ran the following test:

I invited two external email addresses, guest111 is not registered for a Microsoft account and guest is registered for a Microsoft account.

Neither user has an assigned license and logs into OWA separately. Guest222 can log into OWA, while guest11 cannot.

Assigning licenses to two external mailboxes separately, the test results are the same as last time.

According to the test results, the inability to log in to OWA has little to do with the license and is mainly due to the fact that the external email address is not registered with a Microsoft account.

If my answer is helpful to you, please mark it as the answer so that other users can refer to it. Thank you for your support and understanding.

Alex Bui 0 Reputation points

2024-06-11T09:18:05.9433333+00:00

Thanks @Bruce Jing-MSFT

Sorry for just now responding to you.

I tested again follow your comments.

I created an user in another organization and give him a license of this organization, so he can use Outlook website now.

2.then, i unassigned the license for his account, he can not log in to outlook website now.so now, i will invited him to our organization and give him the Microsoft 365 E5 license.

but he also can not log in to Outlook website:
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