how can I change my home address and my phone number.

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1. Sign in to your account using your existing alias and password.
2. Go to Your info at the top of the page.
3. Select Manage how you sign in to Microsoft.
4. You may be asked to verify your account before changes can be made. Follow the instructions provided to select your alias:
   • Select Add email. You can create either a new Outlook.com email address or add an address that you already have. Then, select Add alias. You’ll be returned to the previous screen. Select Verify and
     follow the instructions provided.
   • Or, select Add phone number. Enter the phone number you want to use, and then select Next. When you add a new phone number, we'll send a text message to that number to verify it. Enter the code in the text message, and
     then select Next.
     Note Email addresses and phone numbers that are already an alias on another account can’t be used.
     

It can take up to 48 hours for the change to be implemented across all Microsoft services. If you sign in to your Microsoft account on an Xbox One console by using your Kinect sensor, you might temporarily
be asked to manually sign in with a controller. If you're still being asked to manually sign in after 2 days, try removing your account from the console and then adding it back.
You can use any email address or phone number you have listed as an alias to sign in. To make it harder for someone to break into your account, change your sign-in preferences to turn off any alias
you don't want used to sign in.

I also tried to fill in my phone number instead of the old mail address, but then I only happen to change the password for another more recent Microsoft account that is also linked to my phone number.

Has your query been resolved ?

Hi. My name is Brilliant and I am happy to assist you today.

To remove / add / update a phone number on your Microsoft account:
1. Go to "Manage how you sign in to Microsoft" and sign in to your account: https://account.live.com/names/Manage

2. Select "Add phone number" and follow through the process of verifying your contact details and adding it to your account.

3. You can make the new contact the primary alias by selecting "Make primary".

4. You’ll then have the option to remove the old email address or phone number from your account.

Hope this helps resolve your query. Have a great day.