Join Teams work meetings from Microsoft Teams (free) and vice versa

Microsoft Teams (Free) users can currently join Teams for work (or school) meetings only as guests, which requires them to use a browser and results in a sub-optimal experience. The new feature rolling out will allow these users to join Teams for work (or school) meetings in one click, without being redirected to the browser or asked to fill in their name/surname. They will also be able to continue collaborating with the meeting organizer and other participants via meeting chat after the meeting.  The feature will work in the opposite way as well, so Teams for work (or school) will just as easily be able to join meetings hosted by a Teams Free user with one click. This is associated with Roadmap ID: 167326

Normalization rules order

I was troubleshooting a customer's normalization rules for international dialing, when I came the following conclusion: The order of the normalization rules in the DialPlan is important when you have more than one possible match.

In my setup, I was trying to accommodate how users might possibly try to dial an international number in different ways. Some users might have figured out how to use the + in their contact cards, or when dialing, and those are of no concern. But others will still tend to use "old-style" with a prefix, or forget the "+" all together.

For this I "always" create two simple rules:
One matching any number string longer than 8 digits (No extension in Norway is longer than 8 digits), and adding a + to it. This will Normalize any international number not beginning with a "+" and adding the "+" before routing.
New-CsVoiceNormalizationRule -Identity "Global/NO_INT_Digits" -Pattern '^(\d{8}\d+)$' -Translation '+$1'
The second rule was made to accommodate those who were dialing with the international prefix in front of the number (00)
New-CsVoiceNormalizationRule -Identity "Global/NO_INT_Digits00" -Pattern '^00(\d{8}\d+)$' -Translation '+$1'

What I have not considered before, is the order of which these commands are written. If you enter them in the order I have shown you here, the first rule will always take effect, and the stripping of 00 in the second rule, will never work.

So from now on, I will always add the most specific rule first, then the general rule.

Here's the "complete" list I usually use here in Norway:

New-CsVoiceNormalizationRule -Identity "Global/NO_3_Digits" -Pattern '^(1\d{2})$' -Translation '+47$1'
New-CsVoiceNormalizationRule -Identity "Global/NO_4_Digits" -Pattern '^(18\d{2})$' -Translation '+47$1'
New-CsVoiceNormalizationRule -Identity "Global/NO_5_Digits" -Pattern '^(0\d{4})$' -Translation '+47$1'
New-CsVoiceNormalizationRule -Identity "Global/NO_8_Digits" -Pattern '^(\d{8})$' -Translation '+47$1'
New-CsVoiceNormalizationRule -Identity "Global/NO_INT_Digits00" -Pattern '^00(\d{8}\d+)$' -Translation '+$1'
New-CsVoiceNormalizationRule -Identity "$Global/NO_INT_Digits" -Pattern '^(\d{8}\d+)$' -Translation '+$1'

Hope this saves you from some troubleshooting: Plan your Normalization rules carefully :)

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