Skype for Business Online Audio Conferencing - Dial out behavior change

Microsoft is making some changes to Skype for Business Online Audio Conferencing Dial Out. To best meet our customer’s business needs, Microsoft is adjusting when attendees can add other participants to a Skype for Business meeting via dial out.

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How does this affect us?

Till now, meeting guests are able to add Audio Conferencing attendees at any time.

Going forward, the meeting service will require at least one authenticated user from the organizer’s company to be present in the meeting to allow adding another participant via dial-out. Company attendees can be authenticated through the Skype for Business Client.

Upgrade Audiocodes OVOC 7.4.328 to 7.6.143

AudioCodes One Voice Operations Center (OVOC) is a voice network management solution that combines management of voice network devices and quality of experience monitoring into a single, intuitive web-based application.

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Upgrading

Download the right ISO from the Audiocodes site. Here’s the deeplink (link)

Mount the ISO to the linux system in your Hypervisor.

Login using Putty to the SSH shell with user acems and default password acems.

Promote yourself to root with:

Error 0x800705b4 in Windows Update

Recently i was installing some new servers in my lab environment and ran in to this Windows Update error 0x800705b4.

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Fix the Windows Update issue

Microsoft provides Windows Update troubleshooter which will detect the problem and (try) to fix it. Try using this method to fix the 0x800705b4 error.

Type troubleshoot in Cortana/Search at the bottom left corner of desktop.

Click Troubleshooting on the pop-up menu.

Click System and Security

Move VMs between ESXi Hosts with SSH

Recently is had some issues with capacity and old server hardware. I created some new ESXi hosts and wanted to move the VMs to the new hosts. Below i will describe how i obtained this:

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Setup Access

Start SSH and ESXi Shell on both servers, you can do this from the Web UI, Hosts > Actions > Services

Now create the destination folder (mostly VM name) on the new ESXi host.

Setup OpenVPN server in 2 minutes

With this script you can setup a OpenVPN server within 2 minutes. I really want to give credits to the owner of the script, but i don’t have a clue who wrote this.

	`wget https://git.io/vpn -O openvpn.sh`

Run the installer:

	`sudo bash openvpn.sh`

You can also do this in one command:

	`sudo wget https://git.io/vpn -O openvpn.sh && bash openvpn.sh`		

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Error on installing Kali Tools in Ubuntu

When you want to run a Raspberry Pi for pentesting, you can easily download all of the Kali linux to your Pi.

https://www.ostechnix.com/install-kali-linux-tools-using-katoolin-linux/

After changing the repository i ran in to a error.

While people on the forum ginving some different options, this one worked for me.

	`wget https://http.kali.org/kali/pool/main/k/kali-archive-keyring/kali-archive-keyring_2018.1_all.deb`

	`sudo apt install ./kali-archive-keyring_2018.1_all.deb`

Everything looks fine now. Let’s check for the final.

	`sudo apt-get update`

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How to install and upgrade Office Online Server to the latest version

Office Online Server (OOS) is the next generation of Office Web Apps Server (OWA), which allows organizations to deliver browser-based versions of Word, PowerPoint, Excel and OneNote, among other capabilities.

Most people who need to run Office Online Server are having Skype for Business Server 2015/2019 or SharePoint. Within Skype for Business it will be used for PowerPoint presentations inside meetings.

You can download Office Online Server from MSDN or Volume Licensing Center. The latest version listed over there is November 2017(en_office_online_server_last_updated_november_2017_x64_dvd_100181876.iso). In the meanwhile there have been made some patches available that are solving a lot of issues.