Thank you for contacting the Microsoft Community.
I understand that you are unable to apply the discount for retaking the exam. Allow me to assist you on this matter.
Indeed, you can retake your MS-700 exam 24 hours after your first attempt. Also know that you can use the discount for retake if you attend another Microsoft Virtual Training Day event.
If you have not joined another one, you may register to this page. Keep in mind this offer allows all participants to take advantage of up to 8 event discounts.
On the other hand, if you already participated in the new MVTD event, please be advised that this is redeemable after 5 business days from the last day of your training.
If the waiting period has been concluded and still getting a “No available discount” error, please follow the troubleshooting guidelines below including a complete step for claiming:
Clear cache your browser and cookies and open an In Private edge browser.
Go to MS-700 exam page and schedule it under Pearson Vue.
Please make sure that you sign in using your Personal Microsoft Account on the Dashboard.
Ensure that all the required fields marked with an asterisk * are correctly filled and remove any special characters (like., \! @ # etc.,) from your account information and save.
Then kindly enter the registered email address under “Exam discount” page to check your eligibility and link your accounts.
Once this has been completed, click the “claim” button, once claimed, proceed in schedule exam.
The discount should be reflected on the check-out page. For your reference, you may also watch this instructional video.
If the issue persists, please send us a complete step by step recording using this PSR (Problem Steps Recorder). You can start from the sign in page and make sure to use an InPrivate edge browser until you receive the error after checking your eligibility so I can identify what is causing the issue.
Also, please secure your personal information via private message so I can locate your account along with the discount details requested below so we can have this case escalated if needed:
To view your private message, refer to the image below:

I look forward to your response. Please note that if no response is received after two business days, the case will be closed and locked. After the case is locked, we will no longer be able to respond, even through Private Messages. Thank you.