Sets mailbox access control rights for a specific user.
This method changes the access control list for the mailbox specified in the Mailbox property so that User is granted the permissions specified in Rights.
Rights is a string containing an optional plus ("+") or minus ("-") prefix, followed by zero or more rights characters. If the string starts with a plus, the rights are added to any existing rights for the identifier. If the string starts with a minus, the rights are removed from any existing rights for the identifier. If the string does not start with a plus or minus, the rights replace any existing rights for the identifier.
Standard rights include:
|l||Lookup (visible to be listed)|
|r||Read (Can be selected, fetched, searched, and copied)|
|s||Keep seen/unseen information across sessions|
|w||Write (Store flags other than SEEN and DELETED)|
|i||Insert (Can be appended, and copied into)|
|p||Post (Can send mail to submission address for mailbox)|
|c||Create (Can create new sub-mailboxes)|
|d||Delete (Store DELETED flag, perform EXPUNGE)|
|a||Administer (Set access permissions)|