what’s the unique key in outlook :
when i use the emails (whether in Inbox, Delete, Sent Folder), i would like to use the ID.
the unique ID is UniqueUri or MessageId ?
Thank you for writing to Aspose support team.
Each message in the Inbox, Delete or Sent folder is accessible by its UniqueUri that you can use to download the message and it is always unique for messages. In addition, the Message ID is also unique and preferably used for keeping track of messages or contents. Please let us know if we can be of any additional help to you in this regard.