Hi, Katkar.
Thank you for sharing the information over Private Message.
As you requested, you have a preferred Email you want to keep on your Certification Profile, for that, your profile have to go through a Migration process.
Kindly, please follow the steps below:
1. Start a Microsoft Edge InPrivate browsing session (pressing the key combination Ctrl + Shift + N once the browser is open).
2. Copy and paste this link into the private window’s address bar https://mcp.microsoft.com/mcp/home/migrate
3. Access with your Microsoft account. (Provided via Private Message)

4. If you are shown an error message, please select the option “MCP Home” which will direct you to Your Dashboard, after that you can copy and paste the same link on step 2 in the same search bar.

5. After you have followed the previous link, it will open a new window to Your Dashboard, as shown in the image below.

6. While being on Your Dashboard page, please delete the URL and paste this one: https://mcp.microsoft.com/mcp/home/migrate

7. After pasting the URL and clicking on enter, you will see this website, please fill in the fields MC ID and Access code.

8. Fill in the fields with the following information:
MCID:
Access Code:
To protect personal information, these credentials are provided via Private Message.
After you finish the process, please let us know if you got to access Your Dashboard with your Email and MCID, and inform us to complete your Certification Profile under that Email.
If this solved your problem, please let us know clicking “Yes” where it says, “Did this solve your problem?” located in the bottom right corner of this post. This will let us know if your support experience helps you with your inquiry. In case we do not receive a response, the thread will be closed and locked after one business days.
Wish you a nice day,