How to get user's MaximunAttachmentSize value in Outlook VSTO

Mehmet Ceylan 6 Reputation points
2021-01-21T14:17:16.937+00:00

How to get user's MaximunAttachmentSize value in Outlook VSTO.

Outlook gives a warning when the user adds the file with drag and drop, but when he sends the mail, the mail does not go.

What I want to do is to show the message box if the added file size is larger than outlook MaximunAttachmentSize.

cexml.png

When I say Upload file with Attach File I get an error like this
euRnY.png

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