Outlook not connecting with Exchange 2010 in a network environment on an iMAC.

Outlook 2016 is not connecting to Exchange 2010 in a network environment - on an iMAC.
The icon shows up as orange instead of green.
And I keep getting issues regarding certificates.

I want to delete any any keychain passwords for the Microsoft Outlook app, and perhaps any certificates used by Outlook as well.
How can this be done?
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

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.

Open the Keychain Access App found in /Applications/Utilities.

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
100questionsAuthor Commented:
I tried however there is nothing that indicates I can delete it.
In another MAC I can see how right clicking on the key will allow you to delete it.
Could deleting the key be somehow blocked?
What happens when you right-click on it? Can you post a screen shot? Do you have admin privileges?
Active Protection takes the fight to cryptojacking

While there were several headline-grabbing ransomware attacks during in 2017, another big threat started appearing at the same time that didn’t get the same coverage – illicit cryptomining.

100questionsAuthor Commented:
I will double check and advise back.
If the keychain is locked, Command-L should unlock it, or pull down the File menu to Unlock keychain.
100questionsAuthor Commented:
Even when keychain is unlocked, right clicking on any key chain line does nothing.
In another MAC, right clicking on key chain will allow me to delete it, but not on this iMAC.
Any suggestions?
Pull down the keychain menu and choose keychain first aid.
100questionsAuthor Commented:
I was able to delete the keyhchain by using the menu on the top.
100questionsAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for 100questions's comment #a41151227

for the following reason:

It works
100questionsAuthor Commented:
I used the Menu on the top and then I was able to delete individual keychains.
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.