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Your SU email address (NetID@syr.edu) identifies you as a member of the SU community and will be the name of your individual account within the SU's Google Apps service. This email address cannot be used as the name of other Google accounts, including any personal accounts. Your Google Apps password will be unique to Google Apps; the netid password that you use for MySlice, Blackboard, etc., will not be synchronized with Google Apps.
If you are having trouble logging into your account in SU Google Apps: Google Apps Password assistance
Pre-existing Google Apps Accounts
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