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Below are two sets of instructions for updating distribution groups:
Outlook for Windows:
- Click on Address Book -> Choose More Columns. Under Address Book choose Global Address List from the dropdown menu IF this is a new list (instead of Offline Global Address List)
- Search for the name of the list then double click on it. Click Modify Members and add/remove people as needed. Click OK when finished.
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Outlook Web App (if you aren't using Outlook for Windows)
- Login to https://outlook.office365.com
- Click on the cog wheel in the upper right hand corner (settings) the Mail at the bottom.
- Click General (on the left) -> Distribution Groups
- On the right hand side under "Distribution groups I own" double click on the name of the group then Members. Add/remove as needed then SAVE.