When trying to assign full mailbox rights on an Exchange Multi Tenant installation, you receive this error:
The operation on mailbox [email protected] failed because it’s
out of the current user’s write scope. The object ‘userb’ must be within the read scope before and after it’s modified. Can’t perform the save operation.
+ CategoryInfo : NotSpecified: (ehosting.local/…C/Administrator:ADObjectId) [Add-MailboxPermission], Ta
+ FullyQualifiedErrorId : CFE6232C,Microsoft.Exchange.Management.RecipientTasks.AddMailboxPermission
The fix to this is to simply log into the hosted exchange as the admin for the organisation and run the command again and it works. 🙂