How to share SharePoint Online website with another tenant by Azure B2B

The case

Two companies (for example, parent and affiliate) have their own Microsoft tenants. Both companies are big, let's say more than 10000 users each. Everyday companies hire and fire employees.

The first company (parent) has an Internal website on SharePoint Online. Employees of the second company (child) have to get access to this website. Someone else shouldn't have rights.

Standard approach of Azure B2B "invite each user" is not a suitable option. You (or someone else) can't (it's possible, but I assume you do not want this) manually send an individual invitation for each new user of child company.

Is there another way? Yes, but it's not perfect.

Exchange 2016: What if disable all HealthMailbox mailboxes?

The idea of the post is issue that we faced recently. Sometimes Outlook freezed for a while with warning message.

At the same time SCOM started to warn about issues with Application Pool of one Exchange server. This issues should be linked, but how? 

Exchange server registered warnings 5011 in System Event Log:

How to install Cloudflare WARP on Kali Linux

Surely for experienced Linux admins and experts this is easy question, but for beginners (as for me) it might be helpful.

What we have: Kali Linux 2021.2

What we want: Cloudflare WARP

Let's try to install: sudo apt install cloudflare-warp

And we get an error: E: Unable to locate package cloudflare-warp