Using classic Outlook for Windows in business environments
Hi Steph
Thank you for reaching out to Microsoft Q&A support forum.
Based on your description, I believe your issue might fall into one of two scenarios:
- Scenario 1: Your email domain might still be registered within your former company's tenant, potentially being deactivated or having its sign-in blocked.
- Scenario 2: Your email address may exist as a Guest User account within that tenant, which prevents you from logging in as a personal account.
In either of these scenarios, you will need to contact the Global Administrator of your former organization and ask for their help to remove your account's association with their tenant, specifically ensuring it's no longer in the former tenant.
Hope you will solve the problem soon.
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