Topic Path: Symbol Reference > Classes > TIdMailBox Class > TIdMailBox Properties > UIDNext Property
TIdMailBox.UIDNext Property

Indicates the next UID value for a messaged added to the mailbox.

property UIDNext: String;

UIDNext is a String property that indicates the next Unique Identifier value (UID) that will be assigned to a new message added to the currently selected mailbox. UIDNext is used with UIDValidity to determine the permanent Uniqueness identifier for a message in the currently selected mailbox. 

UIDNext is updatd when the IMAP4 client executes the TIdIMAP4.StatusMailBox method.

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