Implement and configure Teams Phone

Exam objectives are the official skill domains Microsoft 365 Certified: Collaboration Communications Systems Engineer Associate tests. Below are the official AZURE docs our questions on this objective cite — review them, then practise.

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Official references for this objective

Microsoft — Set the phone numbers included on invites in Skype for Business Online - Skype for Business Online (retired) | Microsoft Learn

Set-CsOnlineDialinConferencingUser -Identity amos.marble@Contoso.com -TollFreeServiceNumber +180045551234
Microsoft — Office 365 Enterprise, E1, E3, and E4 plan - Skype for Business Online (retired) | Microsoft Learn

Calling Plan : you can only buy this after you buy the Phone System add-on.
Microsoft — Lync Server 2013: Configure dial plans for dial-in conferencing - Lync Server | Microsoft Learn

Make sure that at least one normalization rule in each dial plan converts telephone extensions into complete phone numbers in E.164 format.
Microsoft — Office 365 Enterprise E5 (without Audio Conferencing) - Skype for Business Online (retired) | Microsoft Learn

you'll need to use a third-party audio conferencing provider. Find a third-party audio conferencing provider at Microsoft PinPoint