Exchange 2016 : How to add warning to mail to say mail send is outside the organisation on outlook

Pham Tien Dung 105

I want to configure a warning when sending mail outside to be displayed on outlook.

I ran the command: Set-OrganizationConfig -MailTipsExternalRecipientsTipsEnabled $true on the exchange management shell

However, the warning only appears on webmail.

I run the command Get-ExternalInOutlook to check and proceed with Set-ExternalInOutlook -Enabled $true but I get an error.

[PS] C:\Windows\system32>Get-ExternalInOutlook

Get-ExternalInOutlook : The term 'Get-ExternalInOutlook' is not recognized as the name of a cmdlet, function, script

file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct

and try again.

At line:1 char:1

Get-ExternalInOutlook


    + CategoryInfo          : ObjectNotFound: (Get-ExternalInOutlook:String) [], CommandNotFoundException

    + FullyQualifiedErrorId : CommandNotFoundException

please help me.

2 answers

Andy David - MVP 151K Reputation points MVP

2024-12-17T12:29:28.15+00:00
Mail tips can take a day to kick in with Outlook with caching so I would give it a day.

Make sure you meet all the requriements:

https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/mailtips/mailtips

The other command isnt relevant to this:

https://learn.microsoft.com/en-us/powershell/module/exchange/get-externalinoutlook?view=exchange-ps

Get-ExternalInOutlook
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Pham Tien Dung 105 Reputation points

2024-12-18T03:24:39.4766667+00:00

thanks for support,but i am asking here is onprem exchange (ex2016) not online exchange

on onprem exchange i run command Get-ExternalInOutlook on the exchange management shell and it gives error:

[PS] C:\Windows\system32>Get-ExternalInOutlook

Get-ExternalInOutlook : The term 'Get-ExternalInOutlook' is not recognized as the name of a cmdlet, function, script

file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct

and try again.

At line:1 char:1
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Jenne Li-MSFT 930 Reputation points Microsoft Vendor

2024-12-18T06:15:24.58+00:00
Hi @ Pham Tien Dung，

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

According to your description, you configured a warning when sending mail outside the organization, and you found that the warning only appears on webmail. You can check whether the mail tips are enabled in the outlook client:

Open Outlook, go to "File" > "Options" > "Mail".

In the "Mail Tips" section, check whether the relevant option is enabled.

In addition, you can use the command to check whether it is configured.

Get-OrganizationConfig | Format-List MailTipsExternalRecipientsTipsEnabled

For the mail tips settings between organizations, you can refer to the Manage MailTips for organization relationships in Exchange Online | Microsoft Learn.

If you have any questions, please feel free to contact me. If the answer is helpful, please click "Accept Answer" because it can help other members of the Microsoft Q&A community who have encountered similar problems and are looking for solutions. Thank you.

Best,

Jeanne
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Pham Tien Dung 105 Reputation points

2024-12-19T07:51:13.0566667+00:00

Hi @Jenne Li-MSFT

Thank you for your support, I would like to respond as follows:

According to your description, you configured a warning when sending mail outside the organization, and you found that the warning only appears on webmail. You can check whether the mail tips are enabled in the outlook client: -> yes

Get-OrganizationConfig | Format-List MailTipsExternalRecipientsTipsEnabled -> MailTipsExternalRecipientsTipsEnabled : True

I have found out that if I want to tag in outlook, I have to run the following commands: Get-ExternalInOutlook -> If set to false, to enable : Set-ExternalInOutlook -Enabled $true

However, when I run the Get-ExternalInOutlook command on Exchange Management Shell (exchange onprem 2016), it gives an error :

[PS] C:\Windows\system32>Get-ExternalInOutlook

Get-ExternalInOutlook : The term 'Get-ExternalInOutlook' is not recognized as the name of a cmdlet, function, script

file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct

and try again.

At line:1 char:1

Get-ExternalInOutlook

+ CategoryInfo : ObjectNotFound: (Get-ExternalInOutlook:String) [], CommandNotFoundException + FullyQualifiedErrorId : CommandNotFoundException

help me pls

Pham Tien Dung 105 Reputation points

2024-12-19T07:59:23.12+00:00

Hi @Jenne Li-MSFT

Thank you for your support, I would like to respond as follows:

According to your description, you configured a warning when sending mail outside the organization, and you found that the warning only appears on webmail. -> yes

You can check whether the mail tips are enabled in the outlook client:

Open Outlook, go to "File" > "Options" > "Mail".

In the "Mail Tips" section, check whether the relevant option is enabled.

I have found out that if I want to tag in outlook, I have to run the following commands: Get-ExternalInOutlook -> If set to false, to enable : Set-ExternalInOutlook -Enabled $true

However, when I run the Get-ExternalInOutlook command on Exchange Management Shell (exchange onprem 2016), it gives an error :

[PS] C:\Windows\system32>Get-ExternalInOutlook

Get-ExternalInOutlook : The term 'Get-ExternalInOutlook' is not recognized as the name of a cmdlet, function, script

file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct

and try again.

At line:1 char:1

help me pls,

Jenne Li-MSFT 930 Reputation points Microsoft Vendor

2024-12-23T09:15:09.01+00:00

Hi @ Pham Tien Dung，

Thanks for your reply. Regarding the Get-ExternalInOutlook command, it can only be used in Exchange Online, so if you use it locally, you will get an error, you can use the command Get-OrganizationConfig | Format-List MailTipsExternalRecipientsTipsEnabled in the answer to query whether it is configured locally. In addition, if you want to add warnings to external mail in Exchange 2016, you can choose to create a transport rule:

Open the Exchange Admin Center (EAC), navigate to "Mail Flow" > "Rules", click the + button, and then choose to create a new rule.

In the "Apply this rule if..." drop-down menu, select "Recipient is...", and then select "Outside the organization".

In the "Do the following..." drop-down menu, select "Add prefix to message headers".

Enter the warning text and click Save to apply the rule.

If you have any questions, please feel free to contact me. If the answer is helpful, please click "Accept Answer" because it can help other members of the Microsoft Q&A community who have encountered similar problems and are looking for solutions. Thank you.

Best,

Jeanne
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