Outlook VSTO add-in causes "Proposed New Time" in response to a Meeting Request, to pick old time RRS feed

  • Question

  • Hi,

    I have an Outlook add-in developed in C#. It doesnt do anything smart; just adds a visual Ribbon, and a button on the ribbon, that shows a Hello World message box.

    I create installer for it using "Publish" from Visual Studio.

    When used with Outlook 2007/Exchange 2010 on both sides:

    1- I send a meeting invite to my colleague A.

    2- A responds with "Propose a new time", with a new time.

    3. I open up the reponse and it shows me the new time proposed correctly.

    4. I click on "Accept Proposal". The start/end time shown is the original start/end time that I specified, and is not the one proposed by my colleague A.

    5. I close the response message and open it again. This time it shows the new time proposed by A correctly.

    Please note that this occurs only with Exchange 2010 and the meeting request should be sent and replied back to, using the same version of Outlook, in my case 2007.

    I wonder if any else is able to see this behaviour? If yes, is there a workaround? Is it a known issue with Microsoft?

    Thanks in advance for any help.



    [Environment: VS2010 - VSTO - Outlook 2007 - Exchange 2010]

    Wednesday, November 21, 2012 4:33 PM

All replies

  • Hi Muhammad,

    Thank you for posting in the MSDN Forum.

    Can you reproduce your issue after you uninstalled your add-in? Can you upload your add-in to SkyDrive?

    You'll need to make it accessible and then share the link.

    I look forward to your reply.

    Best regards,

    Quist Zhang [MSFT]
    MSDN Community Support | Feedback to us

    Friday, November 23, 2012 1:33 PM
  • Hello Quist,

    Thanks for replying.

    No I dont see the issue after uninstalling my addin.

    I am now able to reproduce the issue with a COM addin with IDTExtensibility2 implementation.

    I have uploaded it to skydrive, and you can access the project using this link:!1189&authkey=!AM5Q2mRLbvwwBXc

    Its a VS2012 project.

    Thanks for your help.



    Friday, November 23, 2012 2:49 PM
  • The binaries and a simple .BAT file to install the add-in:!1190&authkey=!APivfPmus28n6hE

    Friday, November 23, 2012 4:25 PM
  • Hi pNULL,

    Thank you for your last reply.

    I'll try to reproduce your scenario. If there's any discovery, I'll come back and let you know.

    Best regards,

    Quist Zhang [MSFT]
    MSDN Community Support | Feedback to us

    Wednesday, November 28, 2012 6:38 AM
  • Hello Quist,

    I was wondering if you managed to reproduce the issue?



    Wednesday, December 5, 2012 10:08 AM
  • The code is different from the code I in Outlook add-in template. That's great.

    But, I cannot see any tab or button. 

    What's life without whimsy?

    Friday, December 7, 2012 4:00 AM
  • Well, you can see the button in "New Email" window only. First button from left.



    Friday, December 7, 2012 9:59 AM
  • Hello Muhammad, Hello Quist

    was there any development or solution in this case?

    i do have the same problem


    Wednesday, November 19, 2014 9:37 AM
  • We ended up calling Microsoft support and they accepted this as an issue and that they will fix this in upcoming releases.

    If you have latest Office software, you should not see this issue, I assume.



    Wednesday, November 19, 2014 10:15 AM
  • Thanks for your Response Muhammad

    but it's still an issue in updated Outlook 2010 and Outlook 2013 versions

    (opening the "new time proposal" message a second time produces other window content with the correct proposed time in the "accept proposal" message)


    Wednesday, November 19, 2014 10:27 AM