By storing these custom MAPI roles in the ACL. Take into account that
a task folder is shared with a calendar folder with the same name, therefore
permissions are shared and overwritten from different Outlook sections.
The extension 'X-SOGO-COMPONENT-CREATED-BY' is used to store the task
creator in both Outlook and SOGo Webmail.
The PidLidTaskOwner is not yet properly managed and we are always returning
the folder owner but to effects of sharing that extension is used by now
which matches a little more with what the user expects until we fix
the task ownership defined in [MS-OXOTASK].
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