Enable External (guest) Access for Microsoft Teams

Microsoft Teams

Microsoft has released Guest Access for Microsoft Teams, but Microsoft Teams guest access is a tenant-level setting and is turned off by default, so i will show you how to turn this on.

Turn on Guest Access on tenant level

Go to your Admin portal, Settings, Services and Addins and select Microsoft Teams. Or use the link below.


Enable Guest access microsoft teams

Invite guests to your Team

go to your Team you want to share and insert the guest users email address

Add guests


DNS configuration is preventing you from presenting content

Skype for Business
It looks like the file is not automatically updating after DNS changes. Some users will get the following error:

You can solve this by deleting the “EndpointConfiguratation.cache” file.

  • Sign out of Skype for Business
  • Click File Exit
  • Open File Explorer
  • Go to “C:/Users/<username>/AppData/Local/Microsoft/Office/16.0/Lync/sip_<username>@sipdomain.com”
  • Select File: EndpointConfiguratation.cache and delete it.
  • Launch Skype for Business client and sign in.

When you have a older version of Office running change the 16.0 to 15.0 or 14.0.

Cloud Connector Edition Upgrade Issues

Cloud Connector Edition

Since i was facing some isssues last time with upgrading our company Cloud Connector Edition it’s a good thing to keep old installers (check below for Archive).

We had the CCE 1.4.2 version running, due to some accounting issues the upgrade to 2.0.0 never has started. You can use Set-CcCredential -AccountType TenantAdmin to set the new global admin account. (Global admin role required for 1.4.2, from 2.0.0 and newer Skype Admin role is required) So after setting the right O365 account i tried to start upgrading the appliance.

Because of the release 2.0.1 the Start-CcDownload cmdlet started downloading the 2.0.1 installer. Started cmdlet Install-CcAppliance -Upgrade and after 1,5 hour the setup stopped with all kind of errors, no sql installed on Edge, certificate issues and so on.

Continue Reading

Let’s Encrypt and Skype for Business

Let's Encrypt Skype for Business

For my home lab I’m using the free certificates from Let’s Encrypt (Let’s Encrypt is a free, automated, and open Certificate Authority).

The certificates from them have 1 big limitation, they are only valid for 3 months but you can renew them “almost” automatically.

As explained In my blog last week about “Skype for Business environment running with just one public IP” I’m running my Reverse Proxy with IIS ARR (Application Request Routing). I’ll try to explain how to request and assign the free certificates for your homelab.

Continue Reading

What’s fixed in Cloud Connector Edition 2.0.1

Cloud Connector Edition

In Cloud Connector Edition 2.0.1, the following fixes were made:

Restarting Virtual Machines sometimes caused the service to stop if the restart order determined by Hyper-V was incorrect. This has been fixed.
Calls for download security checks in remote PowerShell sometimes caused calls to the New-CsOnlineSession cmdlet to fail. This issue has been fixed.

During automatic updates, switching to a new version sometimes caused the running version to fail. This issue has been fixed

You can download the new Cloud Connector Edition 2.0.1 is now. If you have not yet upgraded to 2.0.1, You can find the installation file at https://aka.ms/CloudConnectorInstaller