Summary
When viewing the Global Address List from your Outlook App, you can adjust the column's width to show more, less, or none of that column. You can also adjust the window size to make it smaller or larger.
Adjust Columns or the Window size
If you hover your mouse cursor over the left or right side of a column within the Global Address Book, you can hold left click and adjust the size of the column to make it smaller, larger, or so that it is barely visible. You can also hover your mouse cursor over the bottom right triangle and adjust the window size that way for all of the columns to be visible.
Note: If you need to update your directory information, please refer to Outlook: Requesting Changes for Your Campus Directory Information
Further Readings
Outlook: Requesting Changes for Your Campus Directory Information
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