Cannot change label after applying a sensitivity label with encryption enabled despite being owner

[Peter Hall]

Dear Sir/Madam,

I've migrated my AIP policies to sensitivity labels and during testing, an owner of a document cannot change the label applied to a different one despite being the owner of the document.  The document is located locally during this testing so I could rule out any Sharepoint Online or OneDrive issues.  

Is this a known problem?

Regards

Pete

[#2 · Accepted solution]

@Peter Hall 

Fixed it myself.  For a user assigned a M365 Business licence you need to also assign the Rights Management Adhoc licence which you do not need if you are on an E3 or E5 licence.