MacBook Pro & Apple Mail

I am experiencing some real problems with adding an account to the Mail App program. The account behaves as it should and then
inexplicably the account will vanish from the app!

On a related topic am I able to transfer my contacts I'm Using the Office 365 version of Outlook for Mac. It would appear that Microsoft and Macs do not play very well together
Tony LeatherAsked:
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David AndersTechnician Commented:
Rebuild Plist (preferences)   Simplest thing to try first

Quit Apple Mail.
Navigate to the following directory:
 ~/Library/Containers/com.apple.mail/Data/Library/Preferences
 (OS X 10.7+)* and drag the following file to the Desktop: com.apple.mail.plist (Figure B)
Open Apple Mail to allow the application to recreate a new preferences file.

Troubleshoot by creating a new Gmail account and add that to Mail?
The account type you are attempting to add may not work well with Mail.
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