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Jonathan Miller's avatar
Jonathan Miller
Copper Contributor
Oct 24, 2018

Calender Invite Response Issue

Hi All,

I'm having an issue with all of our users receiving calendar invite responses from external emails from certain email providers. So far I have had issues reported from gmail.com, icloud.com, and yahoo.com. I have done testing from multiple accounts and have been able to verify this is an issue affecting out whole organization.

When a user in our Office 365 sends a calendar invite to user@gmail.com, the gmail account will get the calendar invite, but when they chose a response it doesn't come back to Office 365. Same with Yahoo and iCloud (possibly more).

I sent a case in to Office 365 support, but they weren't able to help at all after looking into it for a couple weeks.  I haven't been able to come up with anything on my own, so I'm hopeful someone else out there has seen this issue before and can help us out.

Thanks!

Jon

office 365

8 Replies

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  • adam deltinger's avatar
    adam deltinger
    MVP
    Oct 24, 2018
    Does this happen to all responses from every of your users to every external user that uses gmail for example?
    Or does it happen for some of your users not receiving responses?
    • Jonathan Miller's avatar
      Jonathan Miller
      Copper Contributor
      Oct 24, 2018

      I obviously haven't tested every single user, but as far as we know its organization wide.

      • adam deltinger's avatar
        adam deltinger
        MVP
        Oct 24, 2018
        Just for test, see If the affected user have their Mail accociated any of the other mail services! Log into that account and check the calendar
  • adam deltinger's avatar
    adam deltinger
    MVP
    Oct 24, 2018
    I know there have been issues with this when you have a for example google account tied to that same address! And responses from the invited sends them to that calendar instead!
  • Adam Ochs's avatar
    Adam Ochs
    Steel Contributor
    Oct 24, 2018

    Hey Jon,

     

    To look into this further, we are going to need some headers of messages.

     

    Could you perhaps grab the full headers of one of the tests you sent to your own gmail/yahoo/whatever.

     

    There are not enough details for us to tell you why this could be happening at the moment, we will need to dig into some of the details of the actual send path.

     

    Adam

    • Jonathan Miller's avatar
      Jonathan Miller
      Copper Contributor
      Oct 24, 2018

      Here are the headers from a test message, I just changed the email addresses for privacy.

       

      Delivered-To: User@gmail.com
      Received: by 2002:a4a:6508:0:0:0:0:0 with SMTP id y8-v6csp4936501ooc;
              Tue, 9 Oct 2018 07:30:02 -0700 (PDT)
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      X-Received: by 2002:a9d:6846:: with SMTP id c6mr9311756oto.65.1539095402085;
              Tue, 09 Oct 2018 07:30:02 -0700 (PDT)
      ARC-Seal: i=1; a=rsa-sha256; t=1539095402; cv=none;
              d=google.com; s=arc-20160816;
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               HiiQ==
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               :thread-topic:subject:to:from:dkim-signature;
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      Return-Path: <User@office365domain.com>
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              by mx.google.com with ESMTPS id r13-v6si4179186oic.86.2018.10.09.07.30.01
              for <User@gmail.com>
              (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
              Tue, 09 Oct 2018 07:30:01 -0700 (PDT)
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      From: Jonathan Miller <User@office365domain.com>
      To: "User@gmail.com" <User@gmail.com>
      Subject: Test 6
      Thread-Topic: Test 6
      Thread-Index: AdRf3I4F0pTx+xf/uUeMYw8wGK9UhQ==
      Date: Tue, 9 Oct 2018 14:29:58 +0000
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