Hello, Aditi.
Welcome to Microsoft Community, here your request will always be well received.
As we understand from your post you want to create an MCID.
first you need to create your Certification profile, please complete the steps listed below:
Click on this link to go to Your dashboard.
Log in with a Microsoft account. If you do not have one, we invite you to create one Here
Edit your information on your Certification profile and add all the personal data it requires.
Save and continue.
Once you have completed this steps, your Certification profile then will be completed as well. The MCID is not create but auto generated once the first exam is booked and passed.
Please consider when selecting the country, its indicator will be added automatically, sometimes users will input the country code in the "Area Code" (the code is often determined by region depending on the size of the country, or by service provider in the case of cellphone numbers) field causing the error.
At the same time, please make sure you do not use any special characters in city/country/address such us æ, ø, å, ä, ö, etc… In case you keep receiving the same error message, please let us know and we will proceed with the proper process.
Please let us know if there is anything else we can do for you. If the information we shared was helpful, please let us know by choosing “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 has been great or how we can improve it. if no response this case will be closed and locked in two business days.
Have an excellent day,