Action required to prepare your app for cloud.microsoft

Hey there, 

Perhaps this is the wrong forum to ask, but since we're discussing Teams apps here, I thought I'd ask. 

Did anyone get emails from Microsoft regarding the changes to the cloud.microsoft? 

The changes involve:

1. Upgrade to version 2.19 or above of the https://www.npmjs.com/package/@microsoft/teams-js
2. Retain the domains that your app’s CSP headers/ x-frame-options currently refer to
3. Update your x-frame-options/CSP headers to allow for  add:
1. *.cloud.microsoft
   
   

The corresponding blog is here: https://devblogs.microsoft.com/microsoft365dev/action-required-ensure-your-microsoft-teams-apps-are-ready-for-upcoming-domain-changes/

We're reviewing some options currently and its looking like there could be wide-spread affect on existing customers of our Teams apps. 

Anyone gone through this? 

Do we know the actual timeline were this will be mandated?