I lost quite a lot of today trying to work out why a bunch of #m365 apps stopped working, on multiple devices.

[richbartlett@infosec.exchange]

I lost quite a lot of today trying to work out why a bunch of #m365 apps stopped working, on multiple devices. Eventually tracked it down to Microsoft CDN being listed by Google Safe Browsing (so my NextDNS service was blocking it). If you're interested, it was impacting res.cdn.office.net which (where I am anyway) resolves to res-stls-prod.edgesuite.net.globalredir.akadns88.net. See https://transparencyreport.google.com/safe-browsing/search?url=res-stls-prod.edgesuite.net.globalredir.akadns88.net&hl=en_GB