Move AIP sublabels to a different parent label

[pheeeling]

Hi 
I'm trying to rebuild my label structure and want to move a existing label to a new parent label to ease user acceptance. It looks like the advanced powershell cmdlets don't allow for that:

WARNING: Encountered exception: Microsoft.Exchange.Management.Transport.LabelParentChangeNotAllowedException: The label
already has a parent 8ebb64e0-8991-4556-8dee-d5ae67a20a74, cannot change to parent
a2d31973-1b2b-4b55-a1f3-06491b124ba9.

Is there a way to do this? Or can I use the Secure Island migration process to move all users from a specifc label to a new one? (https://docs.microsoft.com/en-us/azure/information-protection/rms-client/clientv2-admin-guide-custom...)

Some experience or help would be appreciated.
@Nir Hendler Information Protection & Governance  Microsoft Information Protection

[#2]

Currently solved it recreating a separate label structure and the plan would be to only publish the new label structure to the users. So overtime they should only use the new label.

[#3]

@pheeeling 

you can make a sub-label > parent label (with no sub-labels)
move sub-label to another parent label remove all sub-labels from a parent label, making the original Parent label a normal label without sub-labels and therefor selectable as a label either manually or via auto-labelling client side rules.

example: make sub-label a top level label
set-label -identity nameoflabel -parentid $null

example: move label above to another parent label
set-label -identity nameoflabel -parentid <immutable of parent label>

To make a existing parent label selectable as a label with no sub-labels you simply need to run the first command on each of the exist sub-labels.

for all of the above you first need to connect to SCC by connect-IPPSSession

you can check the settings before and after by running

(get-label nameoflabel).settings