Same issue for me.
I ask like you said, but they said they can't....
Past years, Microsoft were taunting Google to read the mail of their users with the "Gmail Man".
But today, Microsoft modify my mail without asking. -_-
I don't want to be "protected" by they feature.
I regret to had paid for the Office 360. Now my received emails are spoiled.
Hi there!
Thank you for contacting Outlook.com Support. This is Diana and I'll be assisting you today. I got your email and I see that you want to disable the (Safelinks) for your account. Let me help you with this.
The Outlook.com team has enabled premium features for Office 365 subscribers, including no ads and advanced email security. As part of these updates, you now receive a higher level of protection against malware and phishing threats. The Outlook.com service
scans each link you click in your emails, and if the destination website contains suspicious content, you will be redirected to a warning page. We recommend that you do not proceed to any sites that trigger the warning page.
As part of this change, the links in some emails you receive will look different. The links will contain additional information related to the security checks that were performed. Over the coming months, new Outlook.com updates will improve the appearance
of these links while still keeping you protected.
At this time, Outlook.com doesn't provide an option to turn off advanced security on the links. If you're not able to use the links, I can refer this ticket to our escalation team to review.
Thank you for your patience while the Outlook.com team works on improvements to the experience.
For more information about the Outlook.com Premium security features, go to
https://support.office.com/article/Advanced-security-features-in-Outlook-com-Premium-551ddf23-7f35-4697-8a71-30b3359362dd
I appreciate your time in this. Enjoy the rest of the week!