Move from SEP 12.1 RU5 to SEP SBE Cloud ?

Hello,

We currently have SEP 12.1.5 running, and our Corp team wants us to move to Cloud version.

I've download and create the (huge) MSI and exe installer, but it looks to be unable to uninstall our old 12.1.5.

According to some doc found on connect, auto-removable can remove SEP up to version 12.1.3. Any news for current version ?

Is there something planned ? Or is there a basic .exe to automate the removal ?

Don't want to do PC by PC uninstall :(

Thanks,