There are not enough system resources available to complete this operation

Elan Cao 26 Reputation points

Dear Expertise,

Recently more and more of our users are reporting this error, it was firstly start on choose rooms during schedule meeting, and after some days, all address book cannot open.

This happens on Office 2013/2016/2019/2021.

I tried to search, e.g., and but doesn't help, do you have any ideas? Thanks.

Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Faery Fu-MSFT 17,806 Reputation points Microsoft Vendor

    Hi @Elan Cao ,

    Considering that you have already tried some troubleshooting measures, it is recommended that you try other methods:

    • Turn off cache mode and see if the error persists.
    • In order to rule out whether it is caused by some add-ins, run Outlook in safe mode (close Outlook, press Win+R keys, enter "outlook /safe", press Enter), and check the results. If Outlook works as expected, the issue might be due to add-in(s) installed.
    • Delete the Temp folders on the machine and check the result: Click on start->run->type %temp%->delete all contents in that folder.
    • You can delete the public folder favorites by using MFCMapi.

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