I am trying to move bulk users from SfB On-Premise to SfB-Online using Move-CsUser PowerShell Cmdlet. Below is the code snippet:
$INP = Get-Content -Path <txt file path>
$SESSION = New-CsOnlineSession
Import-PsSession $SESSION -AllowClobber
foreach($USER in $INP)
{
Move-CsUser -Identity $USER -Target 'sipfed.online.lync.com' -ProxyPool 'ProxyPool_FQDN' -UseOAuth -Confirm:$False
}
It works fine for 15-20 users and moves them successfully to SfBOnline however, after that it prompts for Office admin credentials again saying "We couldn't sign you in. Please try again" and doesn't accept the credential anymore. Keeps prompting the same.
NOTE:
• I have followed almost all the possibilities from Technet with no luck.
• Disabled MFA from the global admin Office account - No luck.
• Tried using -UserList parameter to move bulk users - Same issue.