Teams SIP Phone BulkSignIn powershell cmd is not working "Set-CsTeamsSipDevicesConfiguration -BulkSignIn"

I found something missing when we try this following command, thought something to do with PS module, or missing some update etc.  

Set-CsTeamsSipDevicesConfiguration -BulkSignIn "Enable" 

as you know this cmd enable the organization-wide Teams SIP devices configuration which contains settings that are applicable to SIP devices connected to Teams using Teams Sip Gateway.

It is being modify but article not been update by Microsoft yet. Following cmd will fix your problem. 

Set-CsTeamsSipDevicesConfiguration -Identity "Global" -BulkSignIn "Enabled"

Required to update
https://learn.microsoft.com/en-us/powershell/module/microsoftteams/set-csteamssipdevicesconfiguration?view=teams-ps