Introducing Follow in inbox and other improvements for managing group emails in Outlook

Same as Mats Samuelsson I'm also looking for a feature similar to Gmail, where it allows you to forward emails to members and delete from group, so it doesn't take a space. We hardly log into group to view emails as they are forwarded to members. And from time to time, I get a notification that mailbox is full. When there are more than 500 emails, you can't bulk delete all as it throws JS error.

emptyTableView.ts:63 Uncaught (in promise) TypeError: Cannot read property 'mailboxInfo' of undefined
    at emptyTableView.ts:63
    at AAQkAGQ1ZTIwYTBlLTBiNGItNDdlNS05NGY0LTVkZjc5ZWM5MDM0NgAQADiLILNxkulAhX3uBErza9w%3D:345
    at Object.next (AAQkAGQ1ZTIwYTBlLTBiNGItNDdlNS05NGY0LTVkZjc5ZWM5MDM0NgAQADiLILNxkulAhX3uBErza9w%3D:345)
    at AAQkAGQ1ZTIwYTBlLTBiNGItNDdlNS05NGY0LTVkZjc5ZWM5MDM0NgAQADiLILNxkulAhX3uBErza9w%3D:345
    at new Promise (<anonymous>)
    at u (AAQkAGQ1ZTIwYTBlLTBiNGItNDdlNS05NGY0LTVkZjc5ZWM5MDM0NgAQADiLILNxkulAhX3uBErza9w%3D:345)
    at emptyTableView.ts:46
    at action.js:6
    at i (legacyApplyMiddleware.js:20)
    at t.promiseMiddleware (index.ts:4)

Also, we can't view really old emails in a group. When I select all, it says 54K emails selected and get above error, but when I manually delete there are only 200 or so recent emails are visible.

So what's the option to clean delete everything in the group mailbox folder?