Is there a MAPI property on the Graph client’s MessageInfo class’s Properties collection that represents whether the email’s read status? We’re looking to select only unread emails from an inbox.
You’re asking whether the MessageInfo.Properties collection contains a MAPI property that indicates the read/unread state of a message.
According to the forum response, the MessageInfo class does not expose all MAPI properties — it only provides a subset of the message data [2]. Because of this limitation, there is no dedicated property in the Properties collection that represents the read flag.
If you need to retrieve only unread messages, you’ll have to use another mechanism (for example, applying a filter at the Graph API level or checking a higher‑level IsRead property if it is exposed). Please share a short code snippet showing how you enumerate MessageInfo.Properties so we can confirm whether any underlying MAPI property (such as PR_MESSAGE_FLAGS) is available in your SDK version.