Outlook 2016: How do I set the default inbox to Imap Gmail?

I have just rebuilt my system with a clean install of Windows 10 and Office 365 (2016). I have several email accounts defined in Outlook, including Gmail (Imap), MSN, Outlook.com and a roadrunner account. Before I did the reinstall, mail would open to my Gmail (Imap) inbox. Now it opens to the Outlook.com inbox.

I believe the determining factor for which inbox is the default is determined by which account is the default in the data tab of Outlook's Account Settings. When I try to set the default to Gmail, it says you cannot set the default to a non-standard OST or PST file. Yet, the Gmail data file seems to be an OST file (....\Outlook\[my-email-name]@gmail.com.ost).

My previous system (before the clean install) started with Windows 7, then was upgraded to Windows 8.1 then upgraded to Windows 10, and Office 2010 was upgraded to Office 2013 then upgraded to Office 2016. Is it possible that the earlier versions allowed this and it carried forward but is now not possible, or have I missed something trying to set it up?

Thanks very much.

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

If your trying to set Outlook to open up your GMAIL box as default rather then the first email address listed on your Outlook, you can go to your Outlook Options > Advanced > and Changed the Outlook Start and exit outlook to your GMAIL INBOX. that will open your gmail inbox each time you opened outlook.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
rosestAuthor Commented:
How did I miss that? ;-)

Thanks very much.

It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.