Is it possible for Email notification to be switched off for a particular User I

You cannot disable the e-mail notifications on a task basis. One approach you could follow is:

1. Turn off the notifications globally and always add a "Send E-mail" activity to notify the availability of a new task at the same level as the "User Input Task" in your model..
2. Turn off the notifications for a specific set of users in a group. Make any model that is used by that group to use the "Send E-mail' to notify instead. To achieve this behavior you can use the "Portal Utilities" plug-in available for download here in Forum. It contains a smart service called "Edit Alert Settings" which allows to disable/enable e-mail/portal alerts for a specific set of users. There's also a sample application as an attachment in that same thread.

1. Deploy the attached JAR under <APPIAN_HOME>\\plugins
2. Import the sample application
4. Run a new instance of the model called "Edit Alert Settings" under "Process Models" - "Edit Alert Settings". with the following settings:

Group: The group you want to disable the e-mails for
Enable/Disable: DISABLE
Media: E-mail
Alert Type: "A new task is assigned to me"

5. Repeat this for all groups you need to disable the e-mail for.
6. Now run the one for the new task assigned to me and others:


Group: The group you want to disable the e-mails for
Enable/Disable: DISABLE
Media: E-mail
Alert Type: "A new task is assigned to me and others"

7. Repeat this for all groups you need to disable the e-mail for.

An enhancement request for configuring notifications on a task basis has been created under the reference number AN-39722.

-Eduardo Fuentes
Appian Technical Support

Great. Thanks. Looking forward to the enhancement.

Can we disable the emails for a specific user?

Yes you can use the same plug-in and model to do this for a specific user. Simply modify the model to receive a user rather than a group and the Edit Alert Settings node to use that new process variable instead of the group; this is possible because actually the smart service receives a list of users as its input but I built the model to use a group for convenience just as a wrapper for multiple users.

The smart service (Edit Alert Settings) comes inside the Portal Utilities plug-in available for download here in Appian Forum under the "Shared Components" record (forum.appian.com/.../all)- Smart Services which can be requested to be deployed to Cloud sites via support case too.

... and the sample application can be directly imported through the UI and is available for download in this component's record forum.appian.com/.../summary