Microsoft Exchange Server form message
File type: Document file
Files with the fdm file extension are associated with Microsoft Exchange Server. An fdm file contains a form message created for Exchange.
The file belongs to the Exchange Forms system used to create and distribute electronic forms.
Found 2 different file type records with the same fdm filename suffix.
File type category:
Document file
Date updated: October 11, 2026
The fdm file extension is associated with Microsoft Exchange Forms Designer, a Microsoft tool for developing electronic forms for use with Microsoft Exchange Server.
Microsoft Exchange Forms Designer is part of Microsoft Exchange Server.
An fdm file contains a saved message that includes a form. The form can be distributed to users through Microsoft Exchange Server.
This is a legacy, Exchange-specific format rather than a general-purpose document format.
Use Microsoft Exchange Forms Designer on Microsoft Windows to open an fdm file.
Software applications that can open fdm files:
Microsoft Windows
Software applications that can edit fdm files:
Microsoft Windows
Software capable of saving fdm files:
Microsoft Windows
Software apps that create fdm files:
Microsoft Windows
Software applications that handle other tasks involving fdm files:
Microsoft Windows
File type category:
Source code and script file
Date updated: October 11, 2026
The fdm file extension is associated with FlashDevelop, a development tool for Microsoft Windows. FlashDevelop allows users to create programs in ActionScript and Haxe.
An fdm file stores a macro created for use in FlashDevelop.
Use FlashDevelop on Microsoft Windows to work with an fdm file and use the macro it contains.
Software applications that can open fdm files:
Microsoft Windows
Software apps that create fdm files:
Microsoft Windows
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