Hi @joon ,
Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.
I understand that you would like to know more about the Basic IP SKU retirement timeline.
This is to notify that users will not be able to use basic SKU IP addresses after 30 September 2025.
And yes, if not upgraded to Standard SKU, these IP Addresses will become unusable and will no longer be supported.
You can continue to use your existing Basic IP address till the above date.
However, you will not be able to create new basic IP addresses after 31 March 2025
You can upgrade your existing basic IP address to standard by following : Upgrade a public IP (if you do not want the IP to change)
I hope this clarifies, please let us know if you require more details on this.
Cheers,
Kapil.
----------------------------------------------------------------------------------------------------------------
Please don’t forget to close the thread by clicking "Accept the answer" wherever the information provided helps you, as this can be beneficial to other community members.