You have a Skype for Business 2015 infrastructure that contains two servers. The servers are configured as shown in the following table.

Pool pairing is configured between ServerFE1 and ServerFE2. Currently, the Central Management store is hosted on ServerFE1.

A hardware failure occurs on ServerFE1.

You manually perform a failover of all the user services and the Central Management store to ServerFE2.

You resolve the hardware issue on ServerFE1.

You need to restore all of the user services and the Central Management store to ServerFE1.

Which three Skype for Business Server 2015 commands should you run? Each correct answer presents part of the solution.

A. Install-CSDatabase -CentralManagementDatabase -SqIServerFqdn ServerFE1.contoso.com -SQLInstanceName RTC-Clean

B. Invoke-CsPoolFailback -PoolFQDN ServerFE2.contoso.com

C. Invoke-CsPoolFailback -PoolFQDN ServerFE1.contoso.com

D. Invoke-CsManagementServerFailover-BackupSqIServerFQDN ServerFE1 contoso.com -BackupSqllnstanceName RTC – Force

E. Move-CsManagementServer

Explanation: