The introduction of Dynamics 365 CE version 9 brings a lot of new functionalities and changes to the table.
One of those smaller changes, I really want to mention is the ability to open a lookup control to select one or more items.
This is something we all did in the past but in a “less” supported way… by reconstructing the URL.

Having this function in the Utility namespace with callback support, is a great addition to build a fluent user interface. Or to even address those entities that don’t allow custom relationships.

Lookup control email template example

Selecting specific email templates to us on a record.

End result looks like:

lookup control

Full documentation and parameters can be found on Microsoft Docs: https://docs.microsoft.com/en-us/dynamics365/customer-engagement/developer/clientapi/reference/xrm-utility/lookupobjects