locked
Certain Excel attachements do not open in Outlook 2010 RRS feed

  • Question

  • After today's Office update certain Excel attachements do not open in Outlook 2010 on a computer of my colleague and it is displayed: Outlook locked this file because it can be harmful. Actually I could not find any solutions. (This attachement is not harmful we know the sender and know the content as well and can open it in Outlook 2013 on another computer.)

    Thanks in advance for any ideas.

    Best regards,

    Lambda61/László

    Wednesday, June 14, 2017 1:39 PM

Answers

  • Hi Lambda61,

    Does this issue affect all computers with Outlook in your environment?
    Do these "certain Excel attachments" have anything in common, such as all have macros?
    How about other types of attachments?

    Please try to download the attachment to local disk and see if it can be opened properly.  

    Besides, as per your concern about the recent Office update, it is recommended to collect the build number of Office via File > Account then we can do further research on this.

    Any findings, please feel free to post back.

    Best regards,
    Yuki Sun



    Please remember to mark the replies as answers if they helped.

    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Thursday, June 15, 2017 4:33 AM
  • Hi Yuki Sun,

    Thanks for your replies. I found the reason right now. The affected Excel attachments ended ..xls. (with two dots) After the sender renames the files to .xls (with one dot) they can be opened perfectly in Outlook at the receiver computer. These two dots in the file names did not cause any problems before the latest Ofiice update and now it is solved for future as well.

    Once again thanks for your posts.

    Best regards,

    Lambda61,László


    Friday, June 16, 2017 7:27 AM

All replies

  • Hi Lambda61,

    Does this issue affect all computers with Outlook in your environment?
    Do these "certain Excel attachments" have anything in common, such as all have macros?
    How about other types of attachments?

    Please try to download the attachment to local disk and see if it can be opened properly.  

    Besides, as per your concern about the recent Office update, it is recommended to collect the build number of Office via File > Account then we can do further research on this.

    Any findings, please feel free to post back.

    Best regards,
    Yuki Sun



    Please remember to mark the replies as answers if they helped.

    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Thursday, June 15, 2017 4:33 AM
  • Hi Lambda61,

    Are there problematic messages in Rich Text format?
    Did you receive the error message "The program used to create this object is Outlook. that program is either not installed on your computer or it is not responding. To edit this object, install Outlook or ensure that any dialog boxes in Outlook are closed"?

    Recently, a hot issue has been reported that after installing KB3203467, all attachments in RTF-formated mails are blocked for opening.

    If this is your case, please try to uninstall KB3203467 to temporarily workaround this issue.

    Best regards,
    Yuki Sun


    Please remember to mark the replies as answers if they helped.

    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Friday, June 16, 2017 2:57 AM
  • Hi Yuki Sun,

    Thanks for your replies. I found the reason right now. The affected Excel attachments ended ..xls. (with two dots) After the sender renames the files to .xls (with one dot) they can be opened perfectly in Outlook at the receiver computer. These two dots in the file names did not cause any problems before the latest Ofiice update and now it is solved for future as well.

    Once again thanks for your posts.

    Best regards,

    Lambda61,László


    Friday, June 16, 2017 7:27 AM
  • Hi Lambda61,

    Great to see that your issue has been resolved and thanks for sharing with us :)

    Have a nice day!

    Regards,
    Yuki Sun


    Please remember to mark the replies as answers if they helped.

    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Friday, June 16, 2017 7:38 AM