You can add all those accounts into the Office apps on your PC or Mac. SEE: Windows, Linux, and Mac commands everyone needs to know (free PDF) (TechRepublic) And if you work as a contractor for multiple organizations, you’ll have an account for each, meaning you need to sign in to multiple Microsoft 365 tenants. If your company works closely with partners or suppliers, you may have guest accounts that give you access to Teams or SharePoint sites for collaborating on projects. You might use Microsoft 365 at work and sign in to your Windows PC with the Azure Active Directory account your organization gives you – and many students have an Office account through their school or college – but you may also have an Office subscription at home, and you probably have a free Hotmail or Outlook email address. It’s fairly common to have more than one Office account. For more info, visit our Terms of Use page. This may influence how and where their products appear on our site, but vendors cannot pay to influence the content of our reviews. We may be compensated by vendors who appear on this page through methods such as affiliate links or sponsored partnerships. Having multiple accounts that you can use with Office on the web is easier to manage with the new account switcher, but there are also options if you need to separate them. How to easily switch accounts for Microsoft 365

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