Cmdlet Extension Agent | New-MoveRequest

Hello together,

I have a question regarding the Cmdlet Extension Agent:

Can I "manipulate" the New-MoveRequest in the way, that I can grab the automatically selected target database, add a prefix to the database to generate the Archive-database Name and then take the new Name for "-ArchiveTargetDatabase" ?

The target is to move the Mailbox in a normal user mailbox database and the archive mailbox to an archive database.

Everytime I try a cmdlet, it says:

WARNING: The cmdlet extension agent with the index 0 has thrown an exception in OnComplete(). The exception is:
Microsoft.Exchange.Provisioning.ProvisioningException: ScriptingAgent: Exception thrown while invoking scriptlet for
OnComplete API: Specified method is not supported.. ---> System.NotSupportedException: Specified method is not
supported.

Thanks in advance!