When inviting organizations to a Funding Opportunity, have the option to select a "Mailing List" group
We have several groups of Organizations saved as a "Mailing List", for easily pulling the list or to send a group email. It would be really helpful to have the option to select one of those mailing lists when inviting a group of organizations to a Funding Opportunity in the Program Manager.
The steps could be to select a radio button option: 1. Add Organization, or 2. Add Group. When selecting the Group option, the drop-down menu of mailing lists is available to select a group of organizations that then can be added to the Funding Opportunity all at once.

Could you clarify or provide more detail on what you're aiming to achieve? Is there a specific reason the email broadcast functionality wouldn't meet your needs?
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Heide Robles commented
The group email function works fine to send an email to a group of organizations on a mailing list, but what I am trying to describe is the ability to select a mailing list of organizations to add these organizations to an "invited" Funding Opportunity in the Program Manager.
In our system, you must add each organization to the Funding Opportunity in the Program Manager (with a role of "Invited Organization"), in order for the Funding Opportunity (Grant Application Link) to be visible in their grantee portal. The only other way I know of to add a group of organizations to a Funding Opportunity is to use the autoloader. The autoloader is too complicated for our staff to use, whereas selecting a group of organizations by clicking a mailing list option seems to be an easy way to add a group of orgs to an invited Funding Opportunity. Thank you