UPN mismatch and sharepoint online

sanka perera 121 Reputation points

Hi All,

We do have Sharepoint online setup for intranet along with work flows and etc.

i have a major concern in UPN setup in our environment.

currently UPN is set up as employeeid@publicdomain.com
SMTP= firstnamelastname@publicdomain.com

i would like to know what could be the impact if didn't change the prefix of the UPN similar to SMTP and continue the sharepoint online. currently we dont have onedrive setup.

is it must to have UPN=SMTP for both SPO and onedrive to work seamlessly?

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SharePoint Server Management
SharePoint Server Management
SharePoint Server: A family of Microsoft on-premises document management and storage systems.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Emily Du-MSFT 43,831 Reputation points Microsoft Vendor

    @sanka perera

    Both changing prefix and suffix belong to changing UPN and according to this Microsoft official article,

    It is best practice, however, to have the person's logon UPN match their primary SMTP address.

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  2. sadomovalex 3,631 Reputation points

    in the past we changed primary domain name used in organization's SPO (together with all users UPNs) so in general it is possible to change it in future if needed.

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