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

Office 365 error "Sorry, we are having some temporary server issues"

 Some time ago I helped with resolving an issue with authorization in Office 365 on Windows 8.

Symptoms

• Error "Sorry, we are having some temporary server issues" while trying to authorize in any Office 365 apps (Word, Excel, etc.).
• Error #455 in the Application Event Viewer "taskhostex(10032) WebCacheLocal: Error - 1032 (0xfffffbf8) while opening log file "C:\...\AppData\Local\Microsoft\Windows\WebCache\V01.log".
• Internet Explorer does not load any website.
• Services window is blank.

Is it possible store VeraCrypt encrypted container on Google Drive and Microsoft OneDrive?

Cloud drive is a best and simple way to protect the data from loss (second copy).

VeraCrypt (as TrueCrypt fork) is a good tool to protect the data from leake (encryption).

It is reasonable to use these technologies together. But this solution has several specifics:

• Encrypted container (VeraCrypt volume) is a single file that can be large. How its changes will upload to the cloud?
• Encrypted container does not change the size. How cloud tools notice a file change?
• How many data VeraCrypt changes during on-the-fly encryption (OTFE)?

Evoko Home, Exchange 2016 and "UNABLE_TO_VERIFY_LEAF_SIGNATURE" issue

Evoko is a perfect room booking system. On the first step (Log In to Exchange 2016 server) of Evoko Home server (version 2.5.0.93 / Windows edition) installation I faced with an error "UNABLE_TO_VERIFY_LEAF_SIGNATURE".

Checkbox "Allow untrusted Exchange server SSL/TLS certificates" skip the error, but I want all certificates to be trusted. The Exchange server uses a certificate issued by local CA. The certificate is not expired, has all needed CNs and fully supported by browsers and Windows (cause a Root CA certificate is stored in "Trusted Root Certification Authorities" container).

Microsoft Office does not respect "VMware" word. Bug or feature?

I'm tired to correct spelling the "VMware" word after autocorrection (to "Vmware") in some Office apps, e.g. while preparation of PowerPoint presentation regarding virtual environment.

Waiting for "Zoom and stick" feature in Microsoft Outlook 2016 (MSI)

Many times users asked me about a feature of saving Zoom in the email preview in Outlook. Instead of paid plugins and macros, I wanted a built-in option.

As it turned out that this wanted a hundred of people from the Globe.

30.11.2018 appeared information that the feature "Zoom and stick" was finally added to Outlook 2016.

But for 2,5 years (2018 - 2021) the feature doesn't yet appeared in my Microsoft Office Pro Plus 2016.

And now I want to figure it out.

VMware vSphere: Pass-through WiFi and "This device cannot start" error (Code 10)

To conduct new research, I needed a WiFi card in a virtual machine. I have the WiFi adapter (Intel Dual Band Wireless-AC 8265) in my Intel NUC5i5MYHE, VMware has VMDirectPath I/O pass-through feature, sounds easy. But it was not easy.

After simple configuration of pass-through the WiFi adapter (including embedded Bluetooth device) appeared in Windows but didn't work. Device status was like this:

This device cannot start. (Code 10)

{Operation Failed}

The requested operation was unsuccessful.

At the same time embedded Bluetooth adapter works properly.

VMware vSphere: Does Hot Add and SCAv1/SCAv2 affect the performance of small VM?

I was wondering how the Hot Add and SCA features affect the performance of small VM (2 vCPU in my case). 

Enabling the Hot Add feature disables vNUMA feature that starts working when the number of virtual CPUs is greater than 8 and "can improve performance by facilitating guest operating system and application NUMA optimizations".

According to a good article "CPU Hot Add Performance in vSphere 6.7" this may reduce performance by 2 - 8%.

But does it affect VMs with a small number of vCPU? Let's check.

To mitigate “L1 Terminal Fault” vulnerabilities on Intel processors (CVE-2018-3646) VMware released KB55806. They propose two options:

1. ESXi Side-Channel-Aware Scheduler (SCAv1) for ESXi 5.5, 6.0, 6.5, and 6.7 prior to 6.7u2.
2. ESXi Side-Channel-Aware Scheduler v2 (SCAv2) for ESXi 6.7u2 (13006603) and later.

SCAv1 disables Hyper Threading, but SCAv2 does not. But all of them should affect performance, even though VMware says "Retain up to 100% performance for low to moderate loaded systems".