I've a picklist feild which value was updating by an workflow rule. now as requirement changes they want to make it as multi select picklist
in the field update workflow action the feild name is not populating
is there any way to update a multi selct picklist field using workflow rule.
Best Answer
https://success.salesforce.com/answers?id=90630000000CijDAAS
this functionality isn't available with workflows. You can't update a mult-select picklist through a field update. For this, you will need to utilize an apex trigger.
Starting from the Spring'15 you can update Multi-Select Picklists using Process Builder
http://releasenotes.docs.salesforce.com/en-us/spring15/release-notes/rn_forcecom_process_ui_updates.htm#multi-select
Use Multi-Select Picklist Fields
Previously, you couldn't select multiple values for any fields. Now you can do so for fields that accept more than one value. For example, if an action creates a record and the record has a multi-select field, you can select multiple values for the multi-select field.
Multi-Select Picklists in the Process Builder
For example, set multiple values for the Country field for a company record that operates in Ireland, the UK, and France.
You can use multi-select picklists in:
In process criteria, set multiple values by creating one condition for each individual multi-select picklist value. For example, if your process checks whether changes were made to an account’s office locations, reference multiple values by choosing the same field for each multi-select picklist value.
Refer to Tips for Working with Picklist and Multi-Select Picklist Formula Fields for more information. When you reference a multi-select picklist field in an action, enter values by clicking Choose values… Add or remove values by dragging them between the Available (1) and Selected (2) columns.
Keep these considerations in mind when using operators with multi-select picklists.
Source: - Multi-Select Picklists in the Process Builder