Link your Google account and Microsoft account
At this time, you cannot use your Google credentials to sign in to your Microsoft account, but you can use your Gmail address as a way to prove who you are. To add your Gmail address as a way to sign in, go to Manage how you sign in to Microsoft.
You can no longer add your Gmail mailbox to your Outlook.com account, but you can use the free Outlook mobile app to show all mailboxes together.
Need more help?
Contact Support
For technical support, go to Contact Microsoft Support, enter your problem and select Get Help. If you still need help, select Contact Support to be routed to the best support option.