locked
Constant Calendar Sync issues and 25GB+ *.ost file size? RRS feed

  • Question

  • We are running O365 w Email, and are running into a constant flow of calendar sync complaints in outlook. These users are all typically Admin Assistants and delegates for multiple Executives, and are always changing schedules and cancelling meetings for the users they are delegates for. They are noticing consistently that they will change a meeting, and it will not update on the users calendar/phone/laptop for an extended period of time. They also notice this for another person in the office that is a delegate for the same user.

    Something to point out is that these delegates all have a local *.ost file in excess of 25GB. Since this is hosted O365 email server, if you remove the *.ost and force it to rebuild, it can take a week or more to rebuild.

    Any ideas or suggestions?

    Wednesday, February 26, 2020 8:50 PM

All replies

  • Hi ,

    What's the version of your Outlook? (File > Office Account > About Outlook). There were improvements to the way shared calendars in Office 365 sync across your applications. Please make sure you have upgraded your Outlook to the latest version.

    >> They are noticing consistently that they will change a meeting, and it will not update on the users calendar/phone/laptop for an extended period of time.
    >> They also notice this for another person in the office that is a delegate for the same user.
    I am trying to understand your issue like below:

    1. A and B are delegates of C.
    2. A or B changes the meeting and sends meeting updates to invitees on behalf of C
    3. C and invitees will have delays on calendar updates

    Is that right? If yes, can C and invitees finally see updates on their calendar? And can C and invitees receive updating emails in time?

    In order to check if it is a client issue, please try exiting Outlook desktop client and see if you issue about delay can be reproduced on the web mail.

    If they all work fine on the web mail, please follow the suggestions below to troubleshoot your issue:

    1. To confirm if the problem is related to your datafile, please try to uncheck the Exchange Cache mode to switch to Online mode like below and see if there is any difference. (File > Account Settings > Account Settings > Double click your e-mail account)
    2. If the send/receive file (.srs) of your account is corrupted, it will cause issues like this. Please delete the .srs file and restart outlook client to test.  
      Location of the .srs file:  C:\Documents and Settings\username\Application Data\Microsoft\Outlook.
    Hope this can be helpful.


    Regards,

    Jeff Yang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Thursday, February 27, 2020 9:06 AM
  • Hi ,

    Have you got your issue fixed?

    I'm writing to see if the reply above is helpful to you.

    If you have any update about this issue, please feel free to post back.


    Regards,

    Jeff Yang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.



    Friday, February 28, 2020 9:46 AM