Outlook 365 users on Exchange Online can not send voting buttons

Daniel Kaliel 1,236 Reputation points
2021-09-10T17:52:19.197+00:00

We have an issue where Exchange Online users are unable to send voting buttons to other Exchange Online users or to our On-Premise users. On-Premise users however can send emails with Voting Buttons.

I have run this command within Exchange Online

Set-RemoteDomain “default” -TNEFEnabled $true

And verified it is set with Get-Domain.

As well in the testing Outlook 365 clients we have set the following:

131118-screenshot-2021-09-10-115103.jpg

But we still can not send voting buttons.

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Accepted answer
  1. Daniel Kaliel 1,236 Reputation points
    2021-09-24T15:53:08.343+00:00

    We were able to solve this. The issue was that we didn't have TNEF enabled on the Remote-Domain that pointed to our exchange online and vice versa.

    As well, we found that enabling TNEF on the default Remote Domain caused a lot of problems with internet users receiving Winmail.dat attachments. So we created Remote domains within Exchange Online and on-premise that use their respective domains with TNEF enabled and disabled it on the default routes which solved this issue.

3 additional answers

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  1. Martin Hancock 6 Reputation points
    2023-02-08T23:47:14.4466667+00:00

    Hi Daniel Kaliel

    Can you please outline how you did your connectors?

    1 person found this answer helpful.
    0 comments
  2. Daniel Kaliel 1,236 Reputation points
    2021-09-10T20:58:45.437+00:00

    I found that if I force a message into Rich Text format the buttons send. Our default is HTML. Is there a way to automatically do this?

    131218-voting.jpg

    0 comments
  3. Joyce Shen - MSFT 16,641 Reputation points
    2021-09-13T01:47:02.897+00:00

    Hi @Daniel Kaliel

    According to your information above, you want to set Rich Text format as default format. And this operation should be performed in Outlook client side. Detailed information here: Message format and transmission settings

    And the method:

    Change the format of all new messages
    On the File tab, choose Options > Mail.

    Under Compose messages, in the Compose messages in this format list, click HTML, Plain Text, or Rich Text.

    131421-image.png

    The official KB which introduces about Change the message format to HTML, Rich Text Format, or plain text for your reference as well.

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