Skype for Business Error Move-CsUser : HostedMigration fault: Error=(0), Description=(Pool is in failed over state.)

Skype for Business Error Move-CsUser : HostedMigration fault: Error=(0), Description=(Pool is in failed over state.). Some info before begin.

UPN – User Principal Name;

O365domainname – name.onmicrosoft.com;

Servername (on-premise) – [email protected];

Poolname (as example) – sippoolDB40E11.infra.lync.com.

When migrate users from Skype for Business Online to Skype for Business Server (on-premise) with (as example) this command:

Move-CsUser -Identity <UPN> -Target <servername> -Credential $cred -HostedMigrationOverrideURL 

You can get next error:

Move-CsUser : HostedMigration fault: Error=(0), Description=(Pool <poolname> is in failed over state.

First of all, check for some users (working and non-working) pool in SfB Online:

1. Connect to SfB online

#cred = Get-Credential
$session = New-CsOnlineSession -Credential $cred -OverrideAdminDomain "<o365domainname>"
Import-PSSession $session

2. Check users in SfB online with command

Get-CsOnlineUser -Identity "UPN"

3. Check attributes

RegistrarPool and OriginatingServer

If broken user has other Pool then working user, do next:

• Unassign SfB Online license for 24 hours or more
• After that time assign license to user
• Check users pool as before
• If pool changed – try to migrate user.

P. S. If attributes are the same or solution not help – create Office365 support request