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Thread: Possible Workaround for Outlook 2007 Resource Calending

  1. #1
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    Default Possible Workaround for Outlook 2007 Resource Calending

    Many users (including myself) have had a problem involving resources on Outlook 2007 and Zimbra. See, for example, http://www.zimbra.com/forums/adminis...html#post58775

    Outlook 2007 appears to add two additional lines in the meeting invite that were not used in Outlook 2003. If you send an invite to a resource from Outlook 2007, you will see the following lines:
    Code:
    X-MICROSOFT-CDO-BUSYSTATUS:TENTATIVE
    X-MICROSOFT-CDO-IMPORTANCE:1
    X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY
    From Outlook 2003, only that middle line (X-MICROSOFT-CDO-IMPORTANCE:1) is sent. By comparison, the following is sent from the Zimbra web client (which does not overschedule resources):
    Code:
    X-MICROSOFT-CDO-BUSYSTATUS:BUSY
    X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY
    Our workaround is to tell postfix to scan incoming messages for the problematic lines and to ignore (delete) them. This was tested on CentOS 5.1 x86_64, zcs-NETWORK-5.0.6_GA_2313.RHEL5_64.20080522105815. Here's how:

    1) tell postfix to use body_checks
    Code:
    [zimbra@mailhost ~]$ postconf -e body_checks=pcre:/opt/zimbra/conf/postfix_body_checks
    2) edit the body_checks file. We want to delete (postfix uses the IGNORE command to do this) lines that match the extra lines sent by Outlook 2007
    Code:
    [zimbra@mailhost ~]$ cat /opt/zimbra/conf/postfix_body_checks
    #/filename=\"?(.*)\.()\"?$/
    #	REJECT For security reasons we reject attachments of this type
    #/^\s*Content-(Disposition|Type).*name\s*=\s*"?(.+\.())"?\s*$/
    #	REJECT Attachment type not allowed. File "$2" has the unacceptable extension "$3"
    /^X-MICROSOFT-CDO-BUSYSTATUS:TENTATIVE/  IGNORE
    /^X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY/  IGNORE
    3) Restart postfix
    Code:
    [zimbra@mailhost ~]$ zmmtactl stop
    [zimbra@mailhost ~]$ zmmtactl start
    So far, we haven't found any other problems caused by this workaround. Give it a try and see if works for you.

  2. #2
    Join Date
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    Default

    Zimbra web client will send
    Code:
    X-MICROSOFT-CDO-BUSYSTATUS:TENTATIVE
    X-MICROSOFT-CDO-INTENDEDSTATUS:TENTATIVE
    if the user manually selects "Tentative." But snipping that for invites is arguably correct -- the invitee can decide between Accept and Accept/Tentative.

  3. #3
    Join Date
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    Default

    Excellent! Thanks heaps SuperBeaker, that looks like a fantastic solution.

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