HTTP 503 Error When Switching to a Different Microsoft Account on OneDrive

Question

When attempting to sign in to a secondary Microsoft account on OneDrive, I consistently receive an HTTP 503 (Service Unavailable) error. The issue persists after refreshing the page every subsequent sign-in attempt to OneDrive returns the same 503 error.

The only workarounds I have found are either opening a private/incognito browsing session or clearing all browsing data entirely, both of which are impractical for regular use.

This might be a session or cookie handling issue when switching between multiple Microsoft accounts in the same browser session.

Answer 1

Many users have reported running into this issue. It seems to happen when multiple different accounts are used to sign in to OneDrive or Microsoft services in the same browser session. For example, this can occur if one account is signed in to Edge, while another account is also signed in through a different Edge tab or an InPrivate window.

To avoid this, try keeping each account in a separate browser. For example, use Edge for one account and Google Chrome for another. This helps prevent account session conflicts and may stop the error from appearing.

Answer 2

I have separate profiles for every Microsoft account I use. It's easy and convenient and you are avoiding the problem you are describing.