How to @comment using a Custom Field type User Picker (multiple users) in Automation rule

[Deleted user]

I would like to @that the users that were capture in a custom field type User Picker (multiple users)

Which is the smart value for a custom field for "User Picker" (multiple users)?

[John Funk]

Hi Israel,

I have not tried to @ a custom field before, but the smart value syntax for any custom field is:

{{issue.Custom Field}} where Custom Field is the exact name of your field. Or you can use the id of the field: {{issue.customfield_16999}} replacing that number with the ID of your custom field. 

[Tony Villa-Cruz]

Not sure if any one still needs this question answered but it looks like a viable answer that worked for me is:

{{#issue.CustomField}} [~accountid:{{accountId}}] {{^last}}, {{/}}{{/}}

Found this answer here from Bill Shelby:

https://community.atlassian.com/t5/Jira-Software-questions/Getting-and-mention-users-in-comment-from-Custom-Field-Multi/qaq-p/1877963