While this doesn’t work perfectly, it does work pretty good. The one issue you can run into is if an email goes into your spam folder on Office 365 you won’t see it in Gmail. So you may need to check it from time to time, or setup a filter to make all email go to Gmail, that may make you get more spam in your inbox though.
Step 1 – Setup Office 365 Email Into Gmail.
Open Gmail in a browser.
Click the Gear icon on the top right.
Click on Settings.
Click on Accounts and Import.
Under Send mail as: > Click Add another email address.
Type in Name, Email Address (of your office 365 account.)
Uncheck Treat as an alias.
Click Next Step.
SMTP Server: smtp.office365.com
Username: Put in your full Office 365 email address (firstname.lastname@example.org)
Password: Put in your Office 365 password.
Select > Secured connection using TLS (recommended.)
Click Add Account.
The next window that opens is the Confirm verification email address you own. You need to go check your Office 365 email, and you should have a verification email in there, you can click the link to verify, then close the above Gmail verification window.
OR you can copy the code from that verification email, into the Gmail verification window, and click Verify.
That’s it, you have now set up the Gmail portion of it.
Step 2 – Forward Your Office 365 Email Into Gmail
Open the Office 365 email in a browser > https://login.microsoftonline.com
Click the Gear Icon in the top right.
On the left under Mail > Accounts > Forwarding.
Choose Start Forwarding.
Check Keep a copy of forwarded messages (if you want a copy to stay on Office 365 – I would recommend this for most cases.)
This can take a few minutes for the forward to start working, but once it does you should be good to go.
How To Check Your New Email
For this to work smoothly is works best if:
Computers: Login and use Gmail in a browser.
Phones and Tablets: Use the official Gmail app.
If you choose to use an email program like Outlook or a different email app on your phone or tablet, it will not allow you to easily use the new email you setup.
When you create a new email, you can now select what account it sends out from, the default account will always be selected unless you choose a different one.
When you get emails into Gmail, and you click reply, it will automatically use the email that it was sent to. So if it was sent to your office 365 email, it will reply like it’s from that one.
If it was sent to your Gmail email address, it will reply like it’s from that one.
You can create different signatures for each account.