Hi! I am a developer and we faced one issue with outlook.com. We have a link in our letters and this link is invalid after the first visit. I guess this issue is connected with the email preview for our link. Is it possible that preview makes extra API call?
What does it mean "this link is invalid after the first visit?"
It means that somebody visited this link before the user. Like someone has clicked this link already. We think, that the preview link mechanism in Outlook.com gets data like a typical user and that why the page will be visited after preview.
Thank you all!