Hi there

This short article it’s to show how to track all Office 365 users Teams Upgrade Effective Mode. Run this before you start your pilot phase to have all users’ previous mode just in case you need to them back.
The following script uses Skype for Business module – check here at my GitHub repository for a script to automate this step if you need or follow along with the script below.
#connect SFB module
Install-Module SharePointPnPPowerShellOnline -Force
$sfbSession = New-CsOnlineSession
Import-PSSession $sfbSession -AllowClobber
Enable-CsOnlineSessionForReconnection
#teams upgrade mode report
Get-CSOnlineUser | select UserPrincipalName, teamsupgrade* | ConvertTo-Html | Out-File "TeamsUpgrade.html"
Get-CSOnlineUser | select UserPrincipalName, teamsupgrade* | ConvertTo-Csv -NoTypeInformation | Out-File "TeamsUpgrade.csv"
- the script saves a TeamsUpgrade.html file with the report on current directory
- the script saves a TeamsUpgrade.csv file with the report on current directory
References
https://docs.microsoft.com/en-us/microsoftteams/teams-only-mode-considerations
Check my Github repository
Thanks,