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Hi @koray kiris,
Welcome to Microsoft Q&A forum.
Thank you for reaching out. To better understand the issue with SharePoint access after changing your email address, could you please clarify the following:
- Did you update your existing Microsoft 365 account by adding/changing an alias (User Principal Name change), or
- Was a completely new user account created for you with the new email address?
- Are you able to access other Microsoft 365 services (Outlook, Teams, OneDrive) with the new email?
- What exact error message do you receive when trying to access SharePoint?
This distinction is important because:
If it is only an alias/UPN change, SharePoint permissions should remain tied to the same underlying account, but cached credentials or profile sync issues may cause access problems.
If a new user account was created, SharePoint will treat it as a different identity, and permissions must be re-assigned manually.
Once I have this information, I can determine the correct resolution steps.
Thank you for your time and understanding. Looking forward to your response.