Your mail server certificate is invalid error

Just to add a bit of background, Outlook app appears to be running all the time along with exchange, although the latter is probably associated with Live.com accounts too.

Basically, it's not working efficiently and is probably using a fair bit of battery in doing so.

My case with the "Your Mail Server Certificate is Invalid" error:

New Pixel 2 XL, Verizon carrier, Android 9 (Pie), Outlook mail app (down loaded from Google Play),  while attempting to add a networksolutionsemail.com account.

Here's what I found by pushing every combination of buttons in Outlook for the last several hours (and that only after most of the day fruitlessly Google searching for a solution)

From within the Outlook mail app:

Select Settings

Select Add Account

Select Add an Email

Enter your personal email address and Select Continue

When the screen returns with the Password field, tap the Help "?" (Are you kidding me!? Why the heck hide it behind the "?') where then and only then will a pop up appear to change the Account Provider.

Once Change Provider is selected then the  screen displays the Microsoft, Google, and Other account types incuding IMAP. When you select IMAP then it's back to the account setup screen to enter your password, your name, and name for the account.

However and Moreover, now when selecting Advanced it will display the Incoming and Outgoing IMAP server fields, of which my email account connected just fine when I left them blank.

As a foot note I had also contacted Outlook Support (found them behind the "?"as would be expected) about POP3.

"Thanks for reaching out and I am more than happy to provide information in regards to POP/POP3 accounts. Currently, we do not support POP or POP3 accounts. It is something we may consider adding in the future.

However, POP and POP3 have many limitations, such as the amount of time received mail remains on the server before being deleted and the ability to retrieve sent mail or sync changes in you mailbox on multiple devices.

I appreciate your time and I hope you are having a great day so far!:)"

Signed by my new friend Bob S- Outlook Mobile Support - Android Support / iOS Support (CSS)

Hope this helps.

Hi,

I successfully installed outlook to check my email on my laptop, but it does not work with my phone. So, it seems the problem is with the app, not the email server itself. I get the same Login Error as everyone else. "Your mail server certificate is invalid." Click login anyway, and the same error just reappears. It is especially frustrating since it was so easy to set up on my computer.

Would it be possible to change the wording on the app to match the setup on the desktop version? I am able to put more data on my desktop about the login, than on my phone.

Thank you.

OK!

If Outlook does not support POP 3, I will simply uninstall and get a different app.

Thank you!

I can log in and it shows me SOME of my messages, but I am not able to send or receive messages.