Outlook encryption issue

My team and I are having issues sending encrypted emails to our clients. Normally when we send them they receive an email with a button to "Read the message" and "Sign in with a One-time passcode"

Now they receive an email with no button saying:

"This message is protected with Microsoft Information Protection. You can open it using Microsoft Outlook, available for iOS, Android, Windows, and Mac OS. Get Outlook for your device here: https://aka.ms/protectedmessage . With Microsoft Information Protection, you can prevent your email messages from being copied or forwarded without your permission. Learn more at https://aka.ms/cp_rms ."

Both links essentially don't lead to anything that helps open the message. Does anyone have a solution or know why this may be happening? Thanks for the help!