Changing RecoverableItemsWarningQuota value

I would like to change the value of the RecoverableItemsWarningQuota for a single mailbox in O365. However, when I attempt to do so, I receive the following error:

>> Set-Mailbox -Identity testmailbox1 -RecoverableItemsWarningQuota 19GB
A positional parameter cannot be found that accepts argument '-RecoverableItemsWarningQuota'.
    + CategoryInfo          : InvalidArgument: (:) [Set-Mailbox], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Set-Mailbox

Is this parameter editable in O365? Is there another way to change this?