When sending an email outside the organziation

@JustinMicheal-7973 Here are my testing about this one: When send emails to Exchange on-premise mailbox, user will cannot read email from both Outlook client and OWA directly. When send emails to Hotmail mailbox, user could read email from both Outlook client and OWA directly. When send email to Outlook.com mailbox, user cannot read email from Outlook client, they could read this email from OWA directly. The Exchange tag mainly force on Exchange related question. The sensitivity labels is an function for Office 365. You could double confirm with the <a href="https://learn.microsoft.com/en-us/microsoft-365/business-video/get-help-support?view=o365-worldwide#:%7E:text=Go%20to%20the%20admin%20center%20at%20https%3A//admin.microsoft.com.%20If%20you%20get%20a%20message%20that%20says%20you%20don%27t%20have%20permission%20to%20access%20this%20page%20or%20perform%20this%20action%2C%20then%20you%20aren%27t%20an%20admin.%20(For%20more%20information%2C%20see%20Who%20has%20admin%20permissions%20in%20my%20business%3F.)" rel="ugc nofollow">Office 365 team . I will also check on this one, if there exist any update about this one, I will update it here. If the response is helpful, please click " Accept Answer " and upvote it. Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

permission issue - Microsoft Q&A

Accepted answer

KyleXu-MSFT 26,211 Reputation points

2021-09-10T05:53:46.087+00:00

@JustinMicheal-7973

Here are my testing about this one:

When send emails to Exchange on-premise mailbox, user will cannot read email from both Outlook client and OWA directly.

When send emails to Hotmail mailbox, user could read email from both Outlook client and OWA directly.

When send email to Outlook.com mailbox, user cannot read email from Outlook client, they could read this email from OWA directly.

The Exchange tag mainly force on Exchange related question. The sensitivity labels is an function for Office 365. You could double confirm with the Office 365 team. I will also check on this one, if there exist any update about this one, I will update it here.

If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
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Sree 1,971 Reputation points

2021-09-10T18:19:46.377+00:00

Are you saying that you get the experience I do when sending a trying to open a protected message from outlook?

KyleXu-MSFT 26,211 Reputation points

2021-09-13T08:40:05.97+00:00

Yes, I try to send an email which has "Do Not Forward" restrictions. Not all external recipients have this phenomenon.

Sree 1,971 Reputation points

2021-09-15T15:13:30.88+00:00

I am still unsure what you are saying. You seemed to suggest that the problem was repeatable by you initially?

Now you are saying it is not repeatable and it works for you?

KyleXu-MSFT 26,211 Reputation points

2021-09-17T08:42:16.743+00:00

Not all external recipients have this phenomenon. When I using an Outlook account as recipient, I get the same result as yours. But this phenomenon doesn't occur on Hotmail mailbox.

KyleXu-MSFT 26,211 Reputation points

2021-09-20T06:16:02.747+00:00

Any update about this thread now? Is the above description clear?

Sree 1,971 Reputation points

2021-09-21T08:18:04.81+00:00

OK so what is seems you are saying is there is an issue depending on what the service the recipients mailbox is hosted on?

In my particular case, my mailbox (the recipient) the mailbox is hosted on Exchange Online. (can you test this scenario?)

So what are the next steps here, it seems that the AIP labelling service is not working properly based upon the targets users mailbox service (some of which from your testing are MS services). Surely it needs a fix..

If we go live with the labelling client our users are very likely to send emails marked with the label I sent details of to external users. If the suers are unable to open these mails it makes the service almost useless..

Please help with a plan of action

KyleXu-MSFT 26,211 Reputation points

2021-09-22T07:38:14.043+00:00

You could double confirm with the Office 365 team for detailed information, this is an Office 365 function. Our team main focus on Exchange related question.
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permission issue

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