Using classic Outlook for Windows in business environments
Could you clarify whether the sender’s name is being truncated with an ellipsis in the message list, or whether Outlook is displaying only part of the sender’s actual name? Which view are you currently using under View > Change View, such as Compact, Single, or Preview?
In the meantime, if the sender’s name is being cut off and you are currently using Compact view, try switching to View > Change View > Single or Preview. You can then widen the From column or add it through View > View Settings > Columns if it is not already displayed.
If you prefer to keep Compact view, move the Reading Pane to the bottom or turn it off under View > Reading Pane > Bottom or Off. This provides more horizontal space for the message list, and you can still adjust the From column as needed.
If the name still appears incomplete even with enough column width, please open one affected message and check whether the full name appears at the top of the Reading Pane or in the message header. This will help determine whether the issue is related to the current view or whether Outlook received only a shortened display name.
If I have misunderstood your question, or if you have any updates to share, please feel free to reply to this thread.
Thank you for your time and cooperation.