Hi Jeroen,
Sorry for any inconvenience caused. To narrow down this issue, I’d like to collect the following information:
1. Are there any txt messages delayed when you receive emails in Outlook clients?
2. Are the voice messages delayed when you receive these message in Outlook Web App?
3. Could you please help to collect the whole content of the mail header of the delayed messages? I’ve sent you a private message to collect the information.
To read private messages, you can do the steps below:
1)Go to the your details section on the right side of the community site.
2)Click Private messages.
3)Click the subject title of the response to read the message.
4)You can reply by using the form in this display.
5)Click Submit Reply.
Thanks,
Vivian Wang