Hi,
Welcome to Microsoft Community.
I understand that you are unable to add your Office 365 account as a send-and-receive account in Outlook.com and I'm here to assist you. Please refer to the link below for the correct settings on settings up your pop account in Outlook.com:
Set up your Gmail, Yahoo! Plus, or Microsoft email accounts in Outlook.com
If you are still unable to successfully set up your account in Outlook.com, I suggest that you set up your Office 365 account as a send only account and forward emails from your Office 365 account to your Outlook.com account so that
you are still sending and receiving emails only that it is different but still similar. Refer to the steps below on how to add a send only account:
-
Sign in to your main account.
-
Click the Options icon
, and then click
More mail settings.
-
Click Your email accounts.
-
Click Add a send-only account, enter the email address and password for your other account, and then click
Next.
Next would be the forwarding, follow the steps below:
-
Choose which account will be your main account, and then sign in to your other account.
-
Click the Options icon
, and then click
More mail settings.
-
Click Email forwarding.
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Select Forward your mail to another email account.
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Enter the email address for the main account.
-
If you want, select Keep a copy of forwarded messages in your
Outlook inbox, and then click Save.
On your problem regarding setting up your Outlook.com account in your Office 365 account, please refer to this
link.
Feel free to ask if you have more questions.
Thank you