Used Save as New to Open a new Project Sheet - Contact List not functioning right

Hi @MarianneD617

A few things to check here:

• Ensure the Column Properties have a list of the Contacts you want populated in your source sheet (double click the column name). This will impact what appears when you go to assign a contact to the cell.
• If names are not in the Contact Column itself (the properties), then to appear in the dropdown list automatically they should be Shared to the sheet. Is it possible the missing contacts are not shared to this new copy?

Here's more information: https://help.smartsheet.com/articles/518335-assigning-people-to-a-task#toc-manage-which-contacts-appear-when-you-type-in-a-cell

The greyed out names will need to be edited either from your "My Smartsheet Contacts" list, the Admin Center (if you're updating their account name), or in their own personal settings.

In regards to the @mention issue, can you clarify what you mean? Are you unable to use any @mention features in comments at all, or just for specific users? Can you try typing their email address instead of name to see if that works?

Thanks,
Genevieve