Your company uses Microsoft Skype for Business Server 2015 and Enterprise Voice as the PSTN solution. You plan to migrate all users to Microsoft Teams Calling Plans. You will decommission Skype for…

Question

Options

• AFrom the Microsoft 365 admin center, purchase Communications Credits for all the users.
• BSchedule a port order for the phone numbers of all the users.
• CFrom the Microsoft Teams admin center, order phone numbers for all the users.
• DMigrate all the users to Teams.

• A
  4% (1)
• B
  83% (19)
• C
  4% (1)
• D
  9% (2)

Explanation

Scheduling a port order first is critical because porting phone numbers from your existing carrier to Microsoft can take weeks to complete, and must be initiated before migration begins. By scheduling the port order upfront and timing the cutover to coincide with user migration, each user's existing number transitions directly to Teams with the shortest possible gap in PSTN service.

• A is wrong - Communications Credits fund pay-as-you-go calling minutes; they have no role in transferring or retaining phone numbers.
• C is wrong - Ordering new numbers from the Teams admin center would assign users different numbers, violating the requirement to retain their current ones.
• D is wrong - Migrating users to Teams before their numbers are ported leaves users without a working PSTN number during the transition window, maximizing downtime rather than minimizing it.

Memory tip: Think of porting like moving your postal address - you file the change-of-address before you move, not after, so mail (calls) arrives at the right place the moment you settle in.

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