[Defender] Security Keys tweak issue

When security keys are outdated, Defender is showing the following message:

https://cdn.livechat-static.com/api/file/v2/lc/att-old/8801096/77898beb2a450058d11f2df7d0076bbe/Schermafdruk%202019-08-20%2014.45.58.png

Where the number of days is decimal.