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Item number in Inbox RRS feed

  • Question

  • Hi,

    We use Outlook 2016. I notice some users always keep all emails in Inbox. They never organize their emails. Some of them can keep the items in the Inbox up to more than 13,000 emails. 

    I remember Outlook performance will be reduced if too many emails in Inbox in old version of Outlook. I wonder if there is still the limitation for the number of items in Inbox for Outlook 2016. What is the best practice for using Outlook? Please advise!

    Thanks in advance! 


    Grace

    Wednesday, October 3, 2018 4:19 PM

Answers

  • Hi Grace,

    For Outlook 2016, the limit is 100,000 items per folder and 500 folders total.

    If you have folders that exceed the limit for the number of items in an Outlook data (.pst) file or an offline Outlook data (.ost) file, please move items from the larger folders to separate or smaller folders in the same mailbox or data file.

    Besides, we should also pay attention to the size of your data file. It is recommended to keep it around 10G. When the size of OST or PST file is more than 10 GB, short pauses begin to occur on most hardware. To workaround this, we can archive our mailbox regularly. Please refer to following official articles:

    Archive items manually

    Archive older items automatically

    Outlook performance issues when there are too many items or folders in a Cached mode .ost or .pst file folder

    Hope this is helpful to you.

    Regards,

    Perry


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


    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    • Marked as answer by graceyin39 Thursday, October 4, 2018 3:40 PM
    Thursday, October 4, 2018 3:04 AM

All replies

  • Hi Grace,

    For Outlook 2016, the limit is 100,000 items per folder and 500 folders total.

    If you have folders that exceed the limit for the number of items in an Outlook data (.pst) file or an offline Outlook data (.ost) file, please move items from the larger folders to separate or smaller folders in the same mailbox or data file.

    Besides, we should also pay attention to the size of your data file. It is recommended to keep it around 10G. When the size of OST or PST file is more than 10 GB, short pauses begin to occur on most hardware. To workaround this, we can archive our mailbox regularly. Please refer to following official articles:

    Archive items manually

    Archive older items automatically

    Outlook performance issues when there are too many items or folders in a Cached mode .ost or .pst file folder

    Hope this is helpful to you.

    Regards,

    Perry


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


    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    • Marked as answer by graceyin39 Thursday, October 4, 2018 3:40 PM
    Thursday, October 4, 2018 3:04 AM
  • Hi Perry,

    Thank you for your reply. You answered my questions.

    Thanks again,



    Grace

    Thursday, October 4, 2018 3:52 PM