Connect to Microsoft Teams PowerShell using Azure App reg. (Service principal) 

Intro
Not long ago Microsoft finally release a new version for the Microsoft Teams PowerShell module (4.8.0) that adds the ability to authenticate to Microsoft Teams using a Azure App reg. 
Using a Azure App reg. Is in my opnion the most secure way to authenticate when you are running scheduled task (or simlar). So if you are not using this method in your automation scripts with Teams, you should start ajusting (on your own risk ofc). 
The ability to use this method to authenticate has not been working for at least 1½ year (as of this writing) so I’m very excited to share the method with you guys. 

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Add new dates to Teams holidays using PowerShell

So, here we again – A new year (and new me?) after the last holiday is over it’s time for a new year and that lucky means new holidays in sight, but in order to truly be off duty, you might need to update your holidays in Teams Admin Center (TAC) so that you and other departments that are dependent on a Auto Attendantes can have the voice mail pick of the phone will you take a day off.

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Set or change a Teams users call forwarding settings with PowerShell

So, as the title says, its now possible to manage a user in your Team tenants call forwarding settings. This is a feature that has been missed by many UC administrator since Teams replaced Skype for Business. But now it’s finally here – Sort of, the features is in preview. The features was release with the new preview version of the Microsoft Teams PowerShell module on the 9 December.

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