A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Dear Jeannine,
Good day!!
Apologies for the inconvenience caused and please don’t worry, let’s work together on your concern and move towards a resolution path.
I understand your concern and would like to let you know that if you want to share the Document Library to users who are not part of your Office 365 organization, you need to enable the external sharing at the tenant level and site level and then add the board members personal email addresses as Guest users into your Office 365 organization, then you can use Grant Access feature for the Document Library. Here are the references:
Change the sharing settings for a site - SharePoint in Microsoft 365 | Microsoft Learn
Note: Please set Anyone as Sharing Settings in the SharePoint Online admin center and site level, so that you can share the content with the users who don’t even have an email address but use Copy Link feature. Reference: How Share and Copy link work in SharePoint and OneDrive | SharePoint Maven
After enabling the sharing settings, please add the users a guest users into the Office 365 organization: Quickstart: Add a guest user and send an invitation | Microsoft Learn
Now, you can follow the below steps to provide the Grant Access to the Document Library:
Open the Document Library> Settings> Library Settings> More Library Settings> Permissions for this document library> Stop Inheriting permissions> Grant Permissions> Enter the Guest User email address> Show Options> Set the permission Level> Share.
Moreover, if you don’t want to add them as guest users and you just want to share the content in your Document Library without any email address, you can use Anyone with the link can edit:
Open the Document Library> Create a Folder> Add a files or move all files into the Folder> Select the Folder> Copy Link> Anyone with the link can edit> Share the link to the board members.
If there is any misunderstanding, we are sorry and please feel free to post back and share more detailed information with some screenshot for better understanding and guiding you furhter.
Appreciate your patience and understanding. Have a great day!!
Best Regards,
Sophia