# Sign in with Microsoft

Source: https://arccare.co.uk/help/getting-started/sign-in-with-microsoft
Last updated: 2026-11-09

Some companies let their people sign in to ARC with their work Microsoft account. You use the same email and password you use for Outlook or Teams. There is no code to wait for.

## Which button to use

1. **Go to the sign-in page.**
2. **Select Sign in with Microsoft.** Or enter your work email first. If your company uses Microsoft, ARC shows the button for you.
3. **Sign in to Microsoft** if it asks you to.

If your company **requires** Microsoft, that is the only way in for most people. ARC will not send you an email code.

If your company only **allows** Microsoft, you can use either. The email code still works.

## The first time

ARC matches your Microsoft account to your ARC account by your work email. You only need to be in your company's ARC already. Microsoft cannot create an account for you. If you have not been invited yet, ask your company admin.

## If it says it can't sign you in

You will see a message like *"We couldn't sign you in with that Microsoft account."* The most common reasons:

- **You used a personal Microsoft account.** Use your work one.
- **Your work email in ARC is different from your Microsoft one.** Ask your company admin to check the email on your ARC record.
- **You have not been added to ARC yet.** Ask your company admin to invite you.
- **You are signed in to the wrong Microsoft account in your browser.** Try a private window.

ARC does not say which of these it was. That keeps other people's accounts private. Your company admin can see the reason in the audit log.

## How long you stay signed in

A Microsoft sign-in lasts **up to 12 hours**. After that you go through Microsoft again. This is on purpose. If someone leaves your company and their Microsoft account is switched off, they are locked out of ARC within 12 hours.

You can sign out sooner at any time.

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