Your mail server certificate is invalid error

Anonymous
2018-03-03T15:59:06+00:00

I am attempting to use Outlook on my android phone.  When I attempt to add my email account to outlook (on my phone) I get an error that says:  Your mail certificate is invalid.  Would you like to login anyway.   PLEASE HELP!!!!

Outlook | Outlook for mobile | Outlook for Android | For business

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  1. Anonymous
    2018-04-26T12:13:51+00:00

    +1 here. We're also seeing this issue on Android devices within the past 24 hours.

    We have hundreds of users complaining that they cannot receive e-mail. If MS haven't issued a fix within the next few hours then we'll have no option but to start migrating users to the gmail app instead. We just cannot have users disconnected for what is already a prolonged period of time. Once our users are onto gmail, we won't be moving people back due to the amount of work it causes our department and the disruption it causes our end users.

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  2. Anonymous
    2018-04-26T12:39:04+00:00

    We are using a Comodo certificate and have and have not run any updates on our 2007 exchange server in about 5 years.  Anyone else in that same situation?  I'm wondering if it could be related to root certificates?

    We have another 2007 mail server on a different domain that uses a GoDaddy certificate and no issues that I am aware of.

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  3. Anonymous
    2018-04-26T13:23:58+00:00

    We're using DigiCert. One server is affected, the other one - not yet, though both are configured the same.

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  4. Anonymous
    2018-04-26T13:32:59+00:00

    We have not run any updates on our 2007 exchange server in about 5 years.  Anyone else in that same situation?  I'm wondering if it could be related to root certificates?

    We have not run updates recently either but the root cert for my CA is valid from 2009-2038. It must have been installed for years without issue.

    Unless it's been revoked and I'm the last to know.

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  5. Anonymous
    2018-04-26T13:36:50+00:00

    We are having the same issue.

    Exchange 2007 - Mobile Outlook app from both Android and iPhone.

    ..mail server cert is invalid. ...

    server certificate is fine.

    OWA and Outlook desktop are working fine.

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