Hi ,
Based on my knowledge mailbox folder permissions will not get inherited .
Please use the below mentioned command to add the specific folder permissions on the target mailbox for the first time .
add-MailboxFolderPermission -Identity "migrationking1@abc.com:\inbox" -User "kumar.n@abc.com" -AccessRights owner
In case if you wanted to edit the provided permissions on the target mailbox folders then we need to use the command set-MailboxFolderPermission instead of add-MailboxFolderPermission .
Below is the example to change the previously provided permission.
set-MailboxFolderPermission -Identity "migrationking1@abc.com:\inbox" -User "kumar.n@abc.com" -AccessRights author
On the first command i am giving the mailbox folder permission as owner over the target mailbox "kumar.n@abc.com" for the user migrationking1@abc.com by using the command add-MailboxFolderPermission
But on the second command i am changing the mailbox folder permission as author over the target mailbox "kumar.n@abc.com" for the user migrationking1@abc.com by using the command set-MailboxFolderPermission
Please reply me if you have any queries.