Hello Miz_Ve, Welcome to the Microsoft Community. Thank you for describing in detail the issue you are experiencing. We understand the importance of address information for account management and subscription services, especially your reliance on Microsoft 365 and the importance of data security.
From your description, it appears that you have tried multiple address format adjustments and contacted online support, but the issue remains unresolved. This situation may be related to address validation logic or cache synchronization delays in your system. Since address validation often relies on real-time matching from external data sources, some new addresses or special formats may require further manual intervention to update records.
As we are only the technical support staff for the community, we can only offer advice on account issues, and although you have attempted to contact online customer support, since online support is divided into different departments, it is recommended that you try contacting the specialized account department and resubmit your address update request:
- Go to the following Web site: Contact - Microsoft Support.
- Enter MSA in the search box, and select Get Help.
- Select Contact Support (sign in to your personal Microsoft account).
- Under Products and services, select Other products.
- Under Category, select Manage profile information.
- Go to Confirm.
Please Note: The Chat support team only works at certain times, so if the last window says you are not available, try to open it again the next day. If you prefer phone support, you can leave a phone number. That way, they can call you and help you.
The reminder about data backups is very wise, and we recommend that you continue to use OneDrive's version history feature or local backups for extra file security.
Thank you for your patience! Best RegardsEliac.S - MSFT | Microsoft Community Support Specialist