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You can review your usage and settings by looking at the g suite dashboard.
Identify and change any accounts that use your Lehigh mail for password recovery
When setting up online services such as Netflix, Amazon, Dropbox, Hulu, etc., you may have specified your Lehigh email address for password recovery or as your default email address. After your account is closed, you will not be able to receive password reset or other important information from companies you buy from or subscribe to. Make sure to update those accounts to specify a non-Lehigh email address.
Download Office 365 portal / OneDrive files
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