https://learn.microsoft.com/en-us/openspecs/exchange_server_protocols/ms-oxcprpt/302967c8-81d5-4ec5-8319-cccc14a76bb5
[MS-OXCPRPT]: Property and Stream Object Protocol | Microsoft Learn
Specifies the Property and Stream Object Protocol, which enables a client to read, set, and delete the properties of an
mspropertystreamobjectprotocol