Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear Riyaz Omar
Good day! Thank you for posting in the Microsoft Community. We'll be happy to help!
First of all, we regret for the inconvenience caused to your work. Based on your description, I have a general understanding of your question, please kindly try again by referring to this official article Update the address for your Microsoft subscription - Microsoft Support
In addition, if your issue persists, if you are using buisness account within business subscription then due to the lack of relevant permissions and tools on our forum, so in order to help you better and not waste any more time, it is advisable to contact our 365 support team directly by phone and they will help you further. For more information, please kindly check Find Microsoft 365 for business support phone numbers by country or region - Microsoft 365 admin | Microsoft Learn
During the phone call, please answer some questions, to reach the support, better use some keywords like your Incorrect formatted postcode problem regarding your account within business subscription.
Here are some other phone numbers for support around the world: Global customer service phone numbers - Microsoft Support
Thank you in advance for your understanding. Your patience and cooperation will be greatly appreciated. I hope for all the best!
Sincerely
Kerry Chen | Community Moderator