Change your preferred email address
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Notifications are sent by default to the preferred email address for your account profile. This is typically the email address you signed into Visual Studio Team Services (VSTS) or Team Foundation Server (TFS) with. You can change this address from your account preferences profile page.
Your preferred email address applies across all of your accounts and cannot be changed on a per-account basis.
To change your preferred email address, open your account menu and select My profile.
From your Profile/Information page, click Edit.
Change the address and save your changes.