Office 365 Duplicate Email Issue

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Users who have Office 365 will have duplicate emails if they use a POP account.

To Resolve:

  1. First, disable Office updates. Inside Outlook, go to File => Office Account => Update Options (dropdown) => Disable Updates.

  2. Close out of all Office applications that are open.

  3. Now open an elevated command prompt (Search => cmd => CTRL+SHIFT+Enter) and run the following:

    C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe /update user updatetoversion=16.0.6366.2068
    • This reverts you to the February build, you will need to re-enable updates in the future once MS comes up with a fix for this.


“Outlook 2016: POP3 duplicates after installing the February 16 Update”