Hi Sasidhar,

Please check the following configuration in the section:

General Tab:

1.Control: Multiselect and refer your property

2.ListSource: Type;Data Page

                        Data Page:Refer your data page(If parametrised one pass the parameter)

3.Search Results Configuration:

               Set the data source property which you want to use and set the property on which value you want to search

If needed set max and min results to display and check the Highlight match if necessary

Presentation Tab:

1.Edit Options: Editable

2.Specify size:Auto

The above configuration helped me.Please find the attachment for configuration and results(in UI) 

Thanku Velu for reply.

if I display multi select from a brand new section its working. Where as failing, when attempting to include control or embed section in existing section. And ours is upgraded from 7.3.1 to 8.1.1 recently.

When you  embed the control or section in existing section, can you render the UI and check whether the multiselect source Datapage holds the results

By SR learned that for time being muli select works only with template forms. And our use case was to show in grid master detail, which falls under non-template.

SR-D30953