Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Dear archdodo
Good day!
Thank you for posting to the Microsoft Community.
Based on your issue description "Cannot receive Security Code" I understand that you've tried several methods but are still experiencing the issue.
To help resolve this, here are some key points you may check:
- Normally, this issue can occur when your current phone number has been used to register Office 365 service for many times. You could use a different phone number or email address to register.
- Make sure you have all the necessary information ready, such as your company name, billing information, and an alternate email address. This can help during the verification process
- Kindly try to change your internet environment and browser and check
For more information for subscription and verification process, I would like to recommend contacting Microsoft Support phone support. I do believe this can be better checked and handled by our billing technical support team. You can contact the team via Phone support or open service request for details, please check Get support - Microsoft 365 admin | Microsoft Learn.
If the issue still persists, you may as well utilize the support options available on the right side of the page. You can contact the sales team through these support options. Compare All Microsoft 365 Plans | Microsoft
for more information, kindly check: Unable to activate a free trial for Business Standard or purchase one - Microsoft Community
If you think that I have provided the necessary information related to this post and it's Helpful, you can also vote for this thread. In order to make this thread a top content and help any other community users who might be facing a similar scenario to easily find this thread/post.
Thank you for your cooperation. stay safe!