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    Va supported this idea  · 
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    Va commented  · 

    All 140+ Outlook users in our company have the same, incorrect suggestions displayed and there is no way to get rid of the adresses....

    To make matters worst, the "functionality" is also in Outlook OWA, from the O365 portal... Even if you desactivated "Suggestion list" by a registry key, the problem will persist in OWA.

    After 5+ hours of troubleshooting and researching through ALL Microsoft services that we are using for the suggested contact information, I'm starting to give up the fight since it seems that the directory where the entry of these suggested email adresses are, is simply unavailable by the administrators themselves...

    Here are the following links & articles I've found on the subject :

    MS Support telling its admins & users the impossibility of editing the "Other Suggestion List":


    Note: You can't remove the entries in the Other Suggestions list or disable this list.

    MS Forum post about the subject, potential "solutions":


    Blogger's suggestion to the problem :


    "The autocomplete entries are stored in a hidden folder called 'recipient cache', which is included in the All Contacts Items search."
    ---> And after many attempts and research, there is no trace of a 'recipient cache' folder, and there is no way to "show hidden folders" in Outlook's Folder Panel.

    Blogger's potential solution with a powershell script (1 mailbox at a time, 2 scriptes available for Outlook 2016 and OWA):


    Blogger's irrelevent post about "a fix" (the problem here is the suggested contacts doesnt show in the regular Contacts directory, so its useless...) :


    Another MS Forum post on the subject with a "work around" :


    MS's Information about the Outlook AutoComplete list :


    To make it short I've search EVERYWHERE;

    Exchange, Azure AD, Delve, Sharepoint, Onedrive, MS 365's conformity content research tool;

    For anyone with a tad of braincells, this situation is simply unacceptable, its simply too much trouble for something that SHOULD be there in the first place...

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