Cannot Verify Server Identity. The identity of @outlook.office365.com@ cannot be verified.

Anonymous
2020-05-26T15:26:48+00:00

I have this message appearing on my iPad every 20 seconds or so.  I use an Office365 exchange account to sync email, contacts and calendar onto the iPad and also use Onedrive for storage along with Word, Excel, Powerpoint etc.

I have had periods of tim when this error message appears, but usually only for 24 hours max.  If it is for a prolonged period, I found that deleting the Exchange account from the iPad and setting it up again often cured the problem.

This time it has been going on for weeks, with no let-up.  I have deleted and set the account up again twice, to no avail.  Please help it's driving me bonkers.

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  1. Anonymous
    2020-07-12T17:55:46+00:00

    URGENT!  I have the same problem "the identity of outlook.office365.com cannot be identified" - but my problem is not on iPhone or ipad but on my PC laptop. I use Outlook365 on Microsoft exchange server. It stopped working yesterday with the above message. I am not able to work without my Outlook working!  HELP!

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  2. Anonymous
    2020-05-27T09:35:04+00:00

    Thanks @Joey Dong MSFT

    That's helpful.  I could try using the Outlook app instead of relying on Apple's iOS Mail, Calendar and Contacts apps, but would prefer have all my various email, calendars and contact accounts in one app, rather than splitting them across two different apps, which could cut down speed of working.  I will try turning the iPad off (again), then also try turning off SSL and see if that makes a difference, will this compromise security though?  

    I use Outlook on Windows 10, an iPhone and a Surface laptop, none of those are reporting this error.  My previous iPhone 7 was prone to this error, but my current iPhone X and iPhone 11 do not have this problem.  Perhaps this would indicate some incompatibility between older iOS devices and current Exchange Server settings.  The iPad is three years old.

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  3. Anonymous
    2020-05-26T19:24:23+00:00

    Hi Cheyenne_99

    Good day to you.

    From your description, you first can change the network environment to check the result. As far as I know, the unstable network would lead to the verifying failure. Besides, you can also try to disable SSL feature to check if it is workable (Access to Settings> Password&Account> Select the exchange account> Advance>turn off SSL on iPad). Furthermore, you can re-start iPad to check if it works.

    If the issue persists, to provide further assistance, we’d like to know what you use mail app, such as Outlook, Mail, etc. In addition, does the issue appears when you sign your account in other devices?

    Looking forward to your update.

    Regards,

    Joey

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