Assign the Voice licenses to users from Setup.
|Available in: Lightning Experience|
|Available in: Professional, Enterprise, Performance, and Unlimited Editions|
Voice is available for an additional cost as an add-on license.
|To assign permission sets:||“Assign Permission Sets”|
From Setup, enter Users in the Quick Find box, then select Users.
Select a user.
In the Permission Set License Assignments related list, click Edit Assignments.
Assign the Voice Minutes, Voice Outbound User, and (if available) Voice Inbound User licenses and click Save.
In the Permission Set Assignments related list, click Edit Assignments.
Add the Voice permission set under Enabled Permission Sets and click Save.
Repeat the process for other users you want to grant Voice access to.
The number of permission sets you can assign is limited by the number of feature licenses you’ve purchased.