OlAttachmentBlockLevel Enumeration (Outlook)

Office 2013 and later
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Specifies whether there is any restriction on the type of attachments for an item.

Name

Value

Description

olAttachmentBlockLevelNone

0

There is no restriction on the type of the attachment based on its file extension.

olAttachmentBlockLevelOpen

1

There is a restriction on the type of the attachment based on its file extension such that users must first save the attachment to disk before opening it.

Attachments with the BlockLevel equal to olAttachmentBlockLevelOpen are on the Level 2 list of attachments that administrators maintain for attachment security. For more information on attachment security in Outlook, see the Office Resource Kit Web site.

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